Page last updated January 19, 2025
 
 
(For my dermatopathology library, go here: https://kikoxp.com/posts/5084)
 
All of my online bone & soft tissue pathology content organized by topic in one place! Just use Ctrl+F, Command+F, or Find in Page to search this page for the entity/topic you need info about to see what I have available. I’ve saved text from many pathology reports I have written over the years; I will be editing and releasing those over time here on this page. As I release new videos, pics, and digital slides online, I’ll add links to them here. My goal is for this to eventually become a free online unofficial bone/soft tissue pathology fellowship-level course for those who need extra education in this area. Please bookmark this page and check back regularly, as I will be continually adding content. 
 
Best wishes,
 
Jerad M. Gardner, MD 
 
Please check out my Soft Tissue Pathology & Dermatopathology survival guide textbooks. A look inside & info about where to buy them here: https://kikoxp.com/posts/17787 
 
Please read this disclaimer before using any of my sample pathology report templates: https://kikoxp.com/posts/5105 
 
You might like my social media guide for pathologists & other doctors: https://kikoxp.com/posts/15217 
 
List of Pathology Video Channels on YouTube & Kiko: https://kikoxp.com/posts/15619 
 
MEGA List of Pathology Podcasts (by Casey Schukow, DO): https://kikoxp.com/posts/20438 
 
 
Normal Bone & Soft Tissue Histology Videos
 
Awesome H&E (Hematoxylin & Eosin) Staining Protocol: https://kikoxp.com/posts/5030 
Common Pathology Immunostains & Special Stains Table for Beginners: https://kikoxp.com/posts/15871 
Myofibroblasts vs Smooth Muscle Made Easy: https://kikoxp.com/posts/3766 
Tendon vs Nerve Made Easy (Ramen Noodle Sign of Fulton): https://kikoxp.com/posts/4466 
Nerve vs Smooth Muscle Histology: https://kikoxp.com/posts/40428 
Normal Bone Histology & Embryology 101 with Dr. Rosenberg: https://kikoxp.com/posts/4166 
Normal Cartilage Histology & Embryology with Dr. Rosenberg: https://kikoxp.com/posts/4437 
Quick trick to know if nodule is in subcutis (video – very short): https://kikoxp.com/posts/10395 
Crazy Mast Cells with Non-specific Immunostaining (video – short): https://kikoxp.com/posts/4829
Images (beautiful endochondral ossification at growth plate): https://kikoxp.com/posts/20899 
 
Soft Tissue Pathology Patterns
Collagen Trapping Pattern in dermatofibroma (atrophic/sclerotic DF): https://kikoxp.com/posts/17071 
Collagen Trapping Pattern in dermatofibroma (aneurysmal DF): https://kikoxp.com/posts/17072 
Curvilinear Vessels Pattern (in myxofibrosarcoma): https://kikoxp.com/posts/14353 
Herringbone Fascicular Pattern (in MPNST): https://kikoxp.com/posts/14062 
Herringbone Fascicular Pattern (in FS-DFSP) (short video from Australasian Dermpath 2022): https://kikoxp.com/posts/22808 
Honeycomb Pattern of fat entrapment (in DFSP): https://kikoxp.com/posts/16903 
Honeycomb Pattern (in fibrous hamartoma of infancy, DFSP, and neurofibroma - All That Is Honeycomb Pattern Is Not DFSP! Tips, Tricks, & When I use FISH – Australasian Dermpath 2022): https://kikoxp.com/posts/22816 
Subtle Nuclear Palisading Pattern aka “Where are the Verocay bodies?!” (in ancient schwannoma): https://kikoxp.com/posts/15193 
Nuclear palisading (serpiginous Verocay bodies - in schwannoma): https://kikoxp.com/posts/18032 
Patternless Pattern of Stout (in solitary fibrous tumor SFT): https://kikoxp.com/posts/17769 
Staghorn/Hemangiopericytic Vessels Pattern (in SFT): https://kikoxp.com/posts/17762 
Storiform Pattern (in DFSP): https://kikoxp.com/posts/10744 
Storiform Pattern (in cellular dermatofibroma): https://kikoxp.com/posts/11468 
Whorling Pattern (in perineurioma - Claudin-1 immunostain): https://kikoxp.com/posts/13000 
Zellballen Pattern (in paraganglioma/pheochromocytoma): https://kikoxp.com/posts/15107 
 
 
Rants & Soapboxes 
Vimentin is Rubbish! The Most Worthless Immunostain: https://kikoxp.com/posts/4771 
Skin lump/bump? It's NOT always "just a cyst/lipoma"! Sarcoma & other cancers can be clinically misdiagnosed as cyst or lipoma. (AIP France 2021): https://kikoxp.com/posts/8754
Will AI replace pathologists? My thoughts on artificial intelligence & pathology: https://kikoxp.com/posts/13876  
"Nobody dies if you're wrong!" (in a lecture/teaching session) - My Advice for How to Learn Medicine: https://youtu.be/Eh3106H45TY 
 
 
 
Compilations & Pathology Board Review Videos
 
Bone Tumor Pathology Basics for Beginners: https://kikoxp.com/posts/4853  
Bone Tumor Pathology 101: Osteosarcoma, Chondrosarcoma, & Mimics (KAPCON) https://kikoxp.com/posts/7674 
Sarcoma Classification 101: Soft Tissue Tumor Naming Made Simple (for Beginners & Non-Pathologists): https://kikoxp.com/posts/6004 
Paris Dermpath Course (5 hours!) at Institut Curie for IAP French Division - October 2021 (adnexal tumors, soft tissue tumors, melanocytic) https://kikoxp.com/posts/8361 
Bone & Soft Tissue Pathology Board Review (21 Cases): https://kikoxp.com/posts/17492 
Bone & Soft Tissue Pathology Board Review: 20 Cases (McGill): https://kikoxp.com/posts/3191 
Basic Soft Tissue Pathology Cases (1): https://kikoxp.com/posts/5434   
Basic Soft Tissue Pathology Cases (2): https://kikoxp.com/posts/5463 
Basic Soft Tissue Pathology Cases (3): https://kikoxp.com/posts/3784 
Basic Soft Tissue Pathology Cases (4): https://kikoxp.com/posts/4468 
Soft Tissue Pathology Cases for FedPatMex 2023: https://kikoxp.com/posts/47044 & https://youtu.be/igApkLBoqBQ 
Vascular Tumors of the Skin 101: https://kikoxp.com/posts/4070
Vascular Tumors of Skin board review (31 cases): https://kikoxp.com/posts/28968
Amazing and rare bone & soft tissue pathology cases (UNC) https://kikoxp.com/posts/5306 
Soft Tissue & Bone Tumor Pathology Unknown Cases (Yale): https://kikoxp.com/posts/4739 
Fat, Muscle, Bone & Cartilage: Dermpath Board Review: https://kikoxp.com/posts/4827 
Neural Tumors, etc: Dermpath Board Review: https://kikoxp.com/posts/4999 
Soft Tissue Pathology Unknowns: Myxoid Fat Spindled (Loyola): https://kikoxp.com/posts/3590 
Cutaneous Soft Tissue Dermpath Unknown Cases (Emory): https://kikoxp.com/posts/3831 
Arthritis & Joint Pathology 101 with Dr. Aubrey Hough: https://kikoxp.com/posts/3654 
Soft Tissue Path (epithelioid FH, atypical FH, paraganglioma, and more): https://kikoxp.com/posts/6553 
Dermpath Fellow Slide Session: Kaposiform hemangioendothelioma, plexiform fibrohistiocytic tumor etc (video) https://kikoxp.com/posts/7911 
Soft Tissue Pathology Course: 19 Cases in 3.5 Hours (Oregon Pathologists Association 2021) (video) https://kikoxp.com/posts/9838 
Bone & Soft Tissue Tumors - Pathology Board Review (from 2021 PathPresenter Pathology MasterClass) (video): https://kikoxp.com/posts/12953 
Fibrohistiocytic Dermpath Basics - dermatofibroma & mimics (video): https://kikoxp.com/posts/18251 
Dermpath Soft Tissue Unknowns - 12 Cases for Australasian Dermatopathology Society 2022 meeting (video): https://kikoxp.com/posts/21344 
Fibrohistiocytic Skin Tumors 101 - Australasian Dermatopathology Society 2022 meeting (video): https://kikoxp.com/posts/22711 
Even MORE Dermpath Soft Tissue Cases for Australasian Dermatopathology Society 2022 meeting (video): https://kikoxp.com/posts/25414 
 
 
Medical Inspiration & Miscellaneous Topics
 
Life/Career Advice for Medical Students & Residents: https://kikoxp.com/posts/4810 
Grades & USMLE Scores Aren't Everything! Medical Inspiration: https://kikoxp.com/posts/4426 
How to Rank Residency Programs for the NRMP Match - My Advice for Medical Students: https://kikoxp.com/posts/4581 
Balancing Family & Career in Medicine: https://kikoxp.com/posts/6357
Permission to Say "No" & Perfect is the Enemy of Good: https://kikoxp.com/posts/6855 
Online Medical Education 101: How I Use Videos, Digital Pathology Slides, & Social Media to Teach https://kikoxp.com/posts/7209 
What's it like to be a pathologist? Here's a day in my life as a Pathologist https://kikoxp.com/posts/4428 
Giardia (cytospin of formalin from small intestine biopsy bottle): https://kikoxp.com/posts/10000 
Entamoeba histolytica (images): https://kikoxp.com/posts/50070 
How to Make Pathology YouTube Videos 101: https://kikoxp.com/posts/13945 
Molecular Testing Basics explained in 15 minutes (video): https://kikoxp.com/posts/14064 
What Happens to Biopsy Samples in the Pathology Lab? (explanation for non-pathologists) https://kikoxp.com/posts/4442 
How to write a medical CV/resume (including professional social media activity): https://kikoxp.com/posts/4071 
 
 
Interviews
 
Interview of Dr. Phillip McKee (May 2019): https://kikoxp.com/posts/4384 
 
 
Reactive & Non-Neoplastic Processes
 
Skeletal muscle atrophy
Video (skeletal muscle histology & atrophy): https://youtu.be/40j1Hz_jfKc & https://kikoxp.com/posts/53931 
Images (atrophy due to invasion by infiltrative BCC in lip): https://kikoxp.com/posts/8132 
Images (atrophy on PASD green stain like soap bubbles…beautiful #pathArt!): https://kikoxp.com/posts/8133 
Video (atrophy on PASD green stain like soap bubbles…beautiful #pathArt): https://youtu.be/ofckE8v6vbI & https://kikoxp.com/posts/53929 
Images (Skeletal muscle atrophy photo dump - cool zig zag nuclei, z lines, small dark clusters and large atypical nuclei with nucleoli): https://kikoxp.com/posts/50068 
 
 
 
Fat atrophy / Lipoatrophy
Video (discussed in this review video): https://kikoxp.com/posts/4827 
 
Chronic Lymphedema / Massive Localized Lymphedema / Elephantiasis Nostras Verrucosa 
(potential mimic of well differentiated liposarcoma!)
 
WSI digital slides: https://kikoxp.com/posts/8182 
Clinical images of massive localized lymphedema 
– large pendulous masses bilateral thigh BMI 65): https://kikoxp.com/posts/8185 
Clinical images of elephantiasis nostras verrucosa
– cobblestone pattern amputation stump dark skin type: https://kikoxp.com/posts/11612 
– cobblestone pattern light skin type: https://kikoxp.com/posts/11613 
Gross images of elephantiasis nostras verrucosa
– foot amputation – amazing example; warning – GRAPHIC images: https://kikoxp.com/posts/11614 
Video (101 – discussion of path, gross, and clinical): https://kikoxp.com/posts/11639 
Video (short - discussion of gross and clinical images only): https://kikoxp.com/posts/11640 
Video (discussed in this review video): https://kikoxp.com/posts/3590 
Gross images – metastatic small cell carcinoma to arm causing severe lymphedema – palliative arm amputation): https://kikoxp.com/posts/17807 
 
Encapsulated fat necrosis
Video (discussed in this review video): https://kikoxp.com/posts/4827 
 
Masson “tumor” (papillary endothelial hyperplasia, a type of organizing thrombus)
Video (Masson in a cavernous hemangioma/vascular malformation): https://kikoxp.com/posts/14133 
Video (discussed in this review video): https://kikoxp.com/posts/6435 
 
Fibrin Thrombus: 
 
Mycobacterial spindle cell pseudotumor
Video (discussed in this review video): https://kikoxp.com/posts/9103 
WSI digital slides (H&E): https://kikoxp.com/posts/5127 
WSI digital slides (Fite AFB & PASD stains): https://kikoxp.com/posts/5308 
 
Ossification vs Calcification??? How to tell them apart: 
 
Ganglion cyst (synovial cyst, Baker cyst)
Video (ganglion & gout & polarizable paraffin crystals): https://kikoxp.com/posts/4432 
Video (ganglion cyst vs chronic bursitis 1): https://kikoxp.com/posts/4722 
Video (ganglion cyst vs chronic bursitis 2): https://kikoxp.com/posts/5055 
 
Granuloma annulare (GA)
WSI digital slide: https://kikoxp.com/posts/3742 
WSI digital slide (metastatic breast carcinoma mimicking interstitial GA): https://kikoxp.com/posts/3743 
Video (short - metastatic breast carcinoma mimicking interstitial GA): https://kikoxp.com/posts/9637 
Video (interstitial granuloma annulare - discussed in this review video): https://kikoxp.com/posts/7960 
Video (deep GA vs rheumatoid nodule): https://kikoxp.com/posts/46649 & https://youtu.be/fDrgZizh8JA 
 
 
Rheumatoid nodule 
WSI digital slide: https://kikoxp.com/posts/3741 
Video (discussed in this review video): https://kikoxp.com/posts/7960 
 
Fracture callus & other reactive bone/cartilage (mimic of osteosarcoma and chondrosarcoma)
Images (atypical reactive bone and cartilage from huge plasmacytoma/myeloma initially misdiagnosed as chondrosarcoma! Very important lessons in this case!): https://kikoxp.com/posts/10399 (case is discussed in this bone pathology 101 video: https://kikoxp.com/posts/7674)
 
Gout
Video (short 2 - gout in bone with osteomyelitis): https://kikoxp.com/posts/46116 & https://youtu.be/zuKjU7SyeTY 
Video (discussed in this review video): https://kikoxp.com/posts/6434 
 
 
Pseudogout (calcium pyrophosphate deposition disease; chondrocalcinosis)
 
 
Osteoarthritis (degenerative joint disease)
Video (discussed in this review video): https://kikoxp.com/posts/3654
 
Osteomyelitis 
Video (short 4 - gout in bone with osteomyelitis): https://kikoxp.com/posts/46116 & https://youtu.be/zuKjU7SyeTY 
Sample pathology report templates: https://kikoxp.com/posts/20095
 
Rheumatoid arthritis
Video (discussed in this review video) https://kikoxp.com/posts/3654
 
Woven bone vs Lamellar bone
Video (discussed in bone pathology 101 video): https://kikoxp.com/posts/7674
 
 
 
SOFT TISSUE TUMORS
 
Adipocytic tumors
 
Lipoma
Video (discussed in this review video): https://kikoxp.com/posts/4827 
 
Lipoma arborescens (synovial lipomatosis) 
WSI digital slides: https://kikoxp.com/posts/24225 
 
Lipomatosis of nerve
 
Lipoblastoma & Lipoblastomatosis
WSI digital slides (with immature myxoid areas): https://kikoxp.com/posts/30735 
WSI digital slides (mature): https://kikoxp.com/posts/30737 
 
Angiolipoma 
Video (discussed in this review video): https://kikoxp.com/posts/4827 
WSI digital slide: https://kikoxp.com/posts/30730 
 
Myolipoma of soft tissue
 
Chondroid lipoma
Video (short 2): https://kikoxp.com/posts/15992  
WSI digital slide: https://kikoxp.com/posts/8273 
 
Hibernoma
Video (discussed in this review video): https://kikoxp.com/posts/4827 
WSI digital slide: https://kikoxp.com/posts/8192 
 
Spindle cell lipoma / Pleomorphic lipoma
Video (short – spindle cell lipoma): https://kikoxp.com/posts/4574 
Video (spindle cell lipoma discussed in this review video): https://kikoxp.com/posts/4827 
Video (pleomorphic lipoma short): https://kikoxp.com/posts/15989 
Video (spindle cell lipoma variants – low fat, myxoid, angiomatous/“pseudoangiomatous” – and pleomorphic lipoma - all discussed in this review video): https://kikoxp.com/posts/3590 
Image (spindle cell lipoma with perfect palisading): https://kikoxp.com/posts/6442 
Images (pleomorphic lipoma with floret cells): https://kikoxp.com/posts/16001 
 
Atypical spindle cell lipomatous tumor / atypical pleomorphic lipomatous tumor
WSI digital slides (spindle cell): https://kikoxp.com/posts/5827 
Sample pathology report template (spindle cell): https://kikoxp.com/posts/5826 
 
WSI digital slides (pleomorphic) (AIP France 2021 – case 13): https://kikoxp.com/posts/5829 
Sample pathology report template (pleomorphic): https://kikoxp.com/posts/5828 
Video (pleomorphic) (AIP France 2021 – case 13): https://kikoxp.com/posts/8520 
Handout & figure images (pleomorphic) (AIP France 2021 – case 13): https://kikoxp.com/posts/8521 
Images (immunohistochemistry - loss of nuclear RB1 expression): https://kikoxp.com/posts/8522 
 
 
Liposarcoma (general info)
Video (liposarcoma 101): https://kikoxp.com/posts/2634 
Video (Lipoblast vs PSEUDOlipoblast Made Easy): https://kikoxp.com/posts/3787 
Image (pleomorphic lipoblast): https://kikoxp.com/posts/5922 
 
Atypical lipomatous tumor/well differentiated liposarcoma (ALT/WDL)
Video (liposarcoma 101 – includes ALT/WDL): https://kikoxp.com/posts/2634 
Video (ALT/WDL with bizarre pleomorphic lipoblasts): https://kikoxp.com/posts/6275 
Video (ALT/WDL lipoma-like): https://kikoxp.com/posts/9855 
Video (massive localized lymphedema a mimic of ALT/WDL): https://kikoxp.com/posts/3590 
WSI digital slide (ALT/WDL lipoma-like): https://kikoxp.com/posts/6834 
Radiology images: https://kikoxp.com/posts/6835 
 
 
Dedifferentiated liposarcoma (DDL)
Video (liposarcoma 101 – includes DDL): https://kikoxp.com/posts/2634 
Video (DDL w/ heterologous osteosarcoma component): https://kikoxp.com/posts/4743 
Video (with myxoid liposarcoma-like areas & herringbone): https://kikoxp.com/posts/9854 
Video (with meningothelial whorls): https://kikoxp.com/posts/47030 & https://youtu.be/s0TdeAxDsbc 
WSI digital slides (with myxoid liposarcoma-like areas & herringbone): https://kikoxp.com/posts/6837 
WSI digital slides (with heterologous osteosarcoma component): https://kikoxp.com/posts/8270 
Radiology images: https://kikoxp.com/posts/6838
Gross pathology images: https://kikoxp.com/posts/6839
 
 
Myxoid liposarcoma
Video (liposarcoma 101 – includes myxoid liposarcoma): https://kikoxp.com/posts/2634 
Video (high grade “round cell” myxoid liposarcoma): https://kikoxp.com/posts/4684 & https://kikoxp.com/posts/8692 
WSI digital slide (high grade “round cell” myxoid liposarcoma): https://kikoxp.com/posts/8140 
WSI digital slide (high grade “round cell” myxoid liposarcoma): https://kikoxp.com/posts/6836 
 
 
Pleomorphic liposarcoma
Video (liposarcoma 101 – includes pleomorphic liposarcoma): https://kikoxp.com/posts/2634 
Video (epithelioid variant): https://kikoxp.com/posts/4752 
Video (epithelioid spindle & myxoid): https://kikoxp.com/posts/9856 
WSI digital slides (epithelioid spindle & myxoid): https://kikoxp.com/posts/6803 
Radiology images: https://kikoxp.com/posts/6804  
Gross pathology images: https://kikoxp.com/posts/6805 
 
 
Fibroblastic & Myofibroblastic Tumors
 
Nodular fasciitis
Video (101- Australasian dermpath 2022): https://kikoxp.com/posts/23099 
Video (short 3 – nodular fasciitis w/ intravascular “invasion”): https://kikoxp.com/posts/15034 
 
Proliferative fasciitis & Proliferative myositis

Video (discussed in bone pathology 101 video): https://kikoxp.com/posts/7674
WSI digital slide: https://kikoxp.com/posts/3536 
 
Myositis ossificans & fibro-osseous pseudotumor of digits
WSI digital slide: https://kikoxp.com/posts/12955 
Radiology images: https://kikoxp.com/posts/13017 
 
Ischemic fasciitis
WSI digital slide (example 1): https://kikoxp.com/posts/30739 
WSI digital slide (example 2): https://kikoxp.com/posts/30741 
WSI digital slide (example 3): https://kikoxp.com/posts/30743 
 
Elastofibroma dorsi
Images (H&E & VVG elastic stain): https://kikoxp.com/posts/9942 
 
Fibrous hamartoma of infancy (FHI)
Video (short – Australasian Dermpath 2022): https://kikoxp.com/posts/23202 
Video (discussed in this review video): https://kikoxp.com/posts/4827 
WSI digital slides: https://kikoxp.com/posts/8206 
 
Fibromatosis colli
 
Juvenile hyaline fibromatosis
 
Inclusion Body Fibromatosis (Infantile Digital Fibroma/tosis)
Video (short – Australasian Dermpath 2022): https://kikoxp.com/posts/22814 
WSI digital slide: https://kikoxp.com/posts/24715 
 
Fibroma of tendon sheath
WSI digital slide: https://kikoxp.com/posts/30753 
 
Desmoplastic fibroblastoma (aka collagenous fibroma)
WSI digital slides: https://kikoxp.com/posts/8209 
WSI digital slide (2): https://kikoxp.com/posts/24221 
 
Sclerotic fibroma (aka storiform collagenoma aka plywood fibroma)
Video (vs desmoplastic fibroblastoma): https://kikoxp.com/posts/4720 
 
Mammary-type myofibroblastoma
WSI digital slide: https://kikoxp.com/posts/4600 
Video (discussed in this review video): https://kikoxp.com/posts/9332 
 
Calcifying aponeurotic fibroma
Video (discussed in this review video): https://kikoxp.com/posts/9105 
WSI digital slide: https://kikoxp.com/posts/5129 
WSI digital slide (2): https://kikoxp.com/posts/15234 
 
EWSR1::SMAD3-positive fibroblastic tumor
 
Angiomyofibroblastoma
 
Cellular angiofibroma
WSI digital slide: https://kikoxp.com/posts/4599 
Video (discussed in this review video): https://kikoxp.com/posts/9331  
 
Angiofibroma of soft tissue
WSI digital slide: https://kikoxp.com/posts/5823 
Sample pathology report template: https://kikoxp.com/posts/5825 
Video (AIP France 2021 – Case 14): https://kikoxp.com/posts/8536 
Handout & figure images (AIP France 2021 – Case 14): https://kikoxp.com/posts/8537  
 
Cutaneous Angiofibroma (Fibrous Papule)
Video (short - with multinucleated giant cells): https://kikoxp.com/posts/47042 & https://youtu.be/M_U1eTqj6nM 
Fibrous Papule/Angiofibroma (images): https://kikoxp.com/posts/15810 
WSI digital slide (angiofibroma with multinucleated giant cells): https://kikoxp.com/posts/47040 
 
Nuchal-type fibroma
WSI digital slide: https://kikoxp.com/posts/3748 
Video (short – Gardner fibroma vs Nuchal-type fibroma): https://kikoxp.com/posts/9641 
 
Gardner fibroma
WSI digital slide: https://kikoxp.com/posts/3747 
Video (short – Gardner fibroma vs Nuchal-type fibroma): https://kikoxp.com/posts/9641 
 
Pleomorphic fibroma
 
Acral fibromyxoma (aka digital fibromyxoma aka superficial acral fibromyxoma; SAF)
WSI digital slides: https://kikoxp.com/posts/4601 
Video (discussed in this review video): https://kikoxp.com/posts/9333 
 
Acquired digital fibrokeratoma (ADFK)
Video (discussed in this review video): https://kikoxp.com/posts/4999 
 
Palmar fibromatosis & plantar fibromatosis
Video (plantar fibromatosis): https://kikoxp.com/posts/12991 
WSI digital slide (plantar fibromatosis): https://kikoxp.com/posts/12965 
 
Desmoid fibromatosis
Images (excision - with entrapped skeletal muscle): https://kikoxp.com/posts/9871 
Images (core needle biopsy - with entrapped skeletal muscle): https://kikoxp.com/posts/10656 
 
Lipofibromatosis
WSI digital slide: https://kikoxp.com/posts/30745 
 
Dermatofibrosarcoma protuberans (DFSP)
Video (101 - Australasian Dermpath 2022): https://kikoxp.com/posts/23204 
Video (short - All That Is Honeycomb Pattern Is Not DFSP! Tips, Tricks, & When I use FISH – Australasian Dermpath 2022): https://kikoxp.com/posts/22816 
Video (myxoid DFSP discussed in this review video): https://kikoxp.com/posts/3590 
Video (DFSP vs DF - short): https://kikoxp.com/posts/6207 
Video (cellular DF vs DFSP discussed in this review video): https://kikoxp.com/posts/9334 
Video (discussed in this review video): https://kikoxp.com/posts/4999 
Video (perfect storiform pattern): https://kikoxp.com/posts/17312  
Video (Bednar tumor - pigmented DFSP): https://kikoxp.com/posts/19122 
Video (FS-DFSP w/ PDGFD fusion Australasian Dermpath 2022 case 1): https://kikoxp.com/posts/21433 
Video (short - Herringbone Fascicular Pattern in FS-DFSP - Australasian Dermpath 2022): https://kikoxp.com/posts/22808 
Video (short – FS-DFSP - Australasian Dermpath 2022): https://kikoxp.com/posts/23101 
WSI digital slide (FS-DFSP w/ PDGFD fusion Australasian Dermpath 2022 case 1): https://kikoxp.com/posts/21577 
WSI digital slide (perfect storiform pattern): https://kikoxp.com/posts/17369 
WSI digital slide (fibrosarcomatous DFSP w storiform & herringbone): https://kikoxp.com/posts/4603 
WSI digital slide (DFSP with possible fibrosarcomatous): https://kikoxp.com/posts/6818 
Image (DFSP with explanation of storiform pattern): https://kikoxp.com/posts/10744 
Images (DF with storiform & fat entrapment – DF vs DFSP tips) https://kikoxp.com/posts/11468 
Images (DFSP with honeycomb fat entrapment): https://kikoxp.com/posts/16797 
Image (DFSP with explanation of honeycomb pattern): https://kikoxp.com/posts/16903  
 
 
Giant cell fibroblastoma (GCF; pediatric DFSP subtype)
WSI digital slide (DFSP plus GCF): https://kikoxp.com/posts/8158 
Video (DFSP plus GCF): https://kikoxp.com/posts/11618 
Video (short - Australasian Dermpath 2022): https://kikoxp.com/posts/23093 
 
Solitary fibrous tumor (SFT)
WSI digital slide: https://kikoxp.com/posts/17749 
Image (SFT with perfect staghorn vessels): https://kikoxp.com/posts/17762 
Sample pathology report template: https://kikoxp.com/posts/10199 
 
Inflammatory myofibroblastic tumor (IMT)
WSI digital slide (lung – best example): https://kikoxp.com/posts/30747 
WSI digital slide (liver): https://kikoxp.com/posts/30749 
WSI digital slide (skin): https://kikoxp.com/posts/30751 
 
 
Low-grade myofibroblastic sarcoma 
 
Superficial CD34-positive fibroblastic tumor 
(Note: may be related to PRDM10-rearranged soft tissue tumors)
WSI digital slides (case 1): https://kikoxp.com/posts/5889 
WSI digital slides (case 2): https://kikoxp.com/posts/5891 
Sample pathology report template: https://kikoxp.com/posts/5888 
Video (AIP France 2021 – case 15): https://kikoxp.com/posts/8538 
Handout & figure images (AIP France 2021 – case 15): https://kikoxp.com/posts/8539    
 
 
Myxoinflammatory fibroblastic sarcoma (MIFS)
Video (discussed in this review video): https://kikoxp.com/posts/9104 
WSI digital slides: https://kikoxp.com/posts/5128 
Image (pseudolipoblast in MIFS): https://kikoxp.com/posts/8420 
 
Infantile fibrosarcoma
WSI digital slide: https://kikoxp.com/posts/19437 
 
Adult fibrosarcoma
Images (Herringbone Fascicular Pattern: usually NOT fibrosarcoma!): https://kikoxp.com/posts/14062 
Video (short – discussion of Herringbone Fascicular Pattern & appropriate uses of “fibrosarcoma” in modern pathology - Australasian Dermpath 2022): https://kikoxp.com/posts/22808 
 
 
Myxofibrosarcoma
Video (Myxofibrosarcoma 101): https://kikoxp.com/posts/4190 
Video (FIBROmyxo vs MYXOfibro Sarcoma Made Simple): https://kikoxp.com/posts/3705 
Video (grade 1 myxofibrosarcoma): https://kikoxp.com/posts/9851 
Video (short - grade 1 myxofibrosarcoma): https://kikoxp.com/posts/15537 
Video (short - grade 3 myxofibrosarcoma): https://kikoxp.com/posts/15583 
Video (grade 1 vs 2 vs 3 - discussed in this review video): https://kikoxp.com/posts/7911 
WSI digital slide (grade 1 myxofibrosarcoma): https://kikoxp.com/posts/6807 
Images (myxofibrosarcoma with perfect pseudolipoblasts & mucin stain): https://kikoxp.com/posts/14352 
Images (curvilinear vessel pattern in myxofibrosarcoma): https://kikoxp.com/posts/14353 
Images (tumor cells aggregating around curvilinear vessels): https://kikoxp.com/posts/14390 
 
Low-grade fibromyxoid sarcoma (LGFMS aka Evans tumor)
Video (LGFMS 101): https://kikoxp.com/posts/4189 
Video (FIBROmyxo vs MYXOfibro Sarcoma Made Simple): https://kikoxp.com/posts/3705 
WSI digital slide: https://kikoxp.com/posts/6806 
WSI digital slide (hyalinizing spindle cell tumor with giant rosettes): https://kikoxp.com/posts/11800 
Sample Pathology Report Template: https://kikoxp.com/posts/9926 
 
 
Sclerosing epithelioid fibrosarcoma (SEF)
WSI digital slide: https://kikoxp.com/posts/19204 
WSI digital slide: https://kikoxp.com/posts/9300   
WSI digital slide: https://kikoxp.com/posts/20423 
 
So-called Fibrohistiocytic Tumors
 
Tenosynovial giant cell tumor (TSGCT), localized & diffuse types
(aka giant cell tumor of tendon sheath & pigmented villonodular synovitis)
Video (Giant cell tumor of tendon sheath & PVNS 101): https://kikoxp.com/posts/4259 
Video (short – giant cell tumor of tendon sheath): https://kikoxp.com/posts/4575 
Video (short 2 – giant cell tumor of tendon sheath): https://kikoxp.com/posts/15581 
Video (GCT tendon sheath - discussed in this review video): https://kikoxp.com/posts/4999 
Video (GCT tendon sheath - discussed in this review video): https://kikoxp.com/posts/4927
Video (short - PVNS): https://kikoxp.com/posts/12996 
Video (short - GCT tendon sheath): https://kikoxp.com/posts/19454 
Video (short – GCT tendon sheath - Australasian Dermpath 2022): https://kikoxp.com/posts/23200 
Video (short – hemosiderin halos aka ladybird cells - Australasian Dermpath 2022): https://kikoxp.com/posts/22810 
WSI digital slide (PVNS): https://kikoxp.com/posts/12980 
Images (lots of pics plus perfect hemosiderin halos aka ladybird cells): https://kikoxp.com/posts/15384 
 
Giant cell tumor of soft tissue
 
Fibrous histiocytoma (dermatofibroma)
Video (dermatofibroma basics 101): https://kikoxp.com/posts/3895 
Video (dermatofibroma 101 Australasian Dermpath 2022): https://kikoxp.com/posts/22713 
Video (aneurysmal dermatofibroma 101): https://kikoxp.com/posts/4449 
Video (aneurysmal DF short): https://kikoxp.com/posts/19432 
Video (huge aneurysmal/hemosiderotic DF with lots of Langerhans cells - discussed in this review video): https://kikoxp.com/posts/7911 
Video (short- cellular DF & aneurysmal DF Australasian dermpath 2022) https://kikoxp.com/posts/23103 
Video (discussed in this review video): https://kikoxp.com/posts/7911 
Video (lipidized ”ankle type” dermatofibroma): https://kikoxp.com/posts/4450  
Video (lipidized dermatofibroma plus tattoo): https://kikoxp.com/posts/40412 
Video (HUGE lipidized DF - short): https://kikoxp.com/posts/16803 
Video (DFSP vs DF - short): https://kikoxp.com/posts/6207 
Video (short - Beware the CD34 Halo in dermatofibroma! (it's NOT DFSP!) – Australasian Dermpath 2022): https://kikoxp.com/posts/22820 
Video (cellular DF - short): https://kikoxp.com/posts/4452 
Video (cellular DF - short): https://kikoxp.com/posts/16798 
Video (cellular DF discussed in this review video): https://kikoxp.com/posts/7911 
Video (cellular DF vs DFSP discussed in this review video): https://kikoxp.com/posts/9334 
Video (cellular DF & hemosiderotic DF): https://kikoxp.com/posts/9844 
Video (short - dermatofibroma with basaloid follicular induction): https://kikoxp.com/posts/7974 
Video (short 2 - DF w/ basaloid follicular induction): https://kikoxp.com/posts/26260 
Video (short - DF w/ induction collision w/ BCC): https://kikoxp.com/posts/9639 
Video (short - DF w/ hemosiderin laden Touton giant cells): https://kikoxp.com/posts/19425 
Video (short - DF w/ induction phenomenon): https://kikoxp.com/posts/19430 
Video (short - DF w/ basaloid induction): https://kikoxp.com/posts/19433 
Video (short - DF w/ monster cells – Australasian dermpath 2022): https://kikoxp.com/posts/23095 
Video (short – ankle type lipidized DF - Australasian dermpath 2022): https://kikoxp.com/posts/23109 
Video (short – “sclerosing hemangioma” aka aneurysmal DF): https://kikoxp.com/posts/30184 
WSI digital slide (DF w basaloid induction & collision w/ BCC): https://kikoxp.com/posts/3745 
WSI digital slide (cellular dermatofibroma): https://kikoxp.com/posts/4602 
WSI digital slide (cellular DF & hemosiderotic DF): https://kikoxp.com/posts/6832 
Images (DF w basaloid follicular induction mimicking BCC): https://kikoxp.com/posts/17988 
Images (DF with storiform & fat entrapment – DF vs DFSP tips) https://kikoxp.com/posts/11468 
Images (atrophic/sclerotic DF with collagen trapping): https://kikoxp.com/posts/17071 
Images (aneurysmal/hemosiderotic DF with collagen trapping): https://kikoxp.com/posts/17072 
Images (HUGE aneurysmal dermatofibroma): https://kikoxp.com/posts/20297 
 
Atypical fibrous histiocytoma (atypical dermatofibroma)
WSI digital slide: https://kikoxp.com/posts/40406 
 
Epithelioid fibrous histiocytoma (EFH) (ALK-1 positive)
Video (EFH w/ signet ring & xanthomatous cells Australasian Dermpath 2022 Case 2): https://kikoxp.com/posts/21437 
WSI digital slide (EFH w/ signet ring & xanthomatous cells Australasian Dermpath 2022 Case 2): https://kikoxp.com/posts/21597 
 
Dermatomyofibroma
Video (discussed in this review video): https://kikoxp.com/posts/4827 
Video (discussed in this review video): https://kikoxp.com/posts/7911 
 
 
CD34+ Fibroblastic Connective Tissue Nevus
Video (FCTN vs dermatomyofibroma - discussed in this review video): https://kikoxp.com/posts/7911 
 
Plexiform fibrohistiocytic tumor
Video (discussed in this review video): https://kikoxp.com/posts/7911 
 
 
 
Vascular Tumors
 
Acquired Elastotic Hemangioma
 
Angiokeratoma
 
Anastomosing hemangioma
Video (discussed in this review video): https://kikoxp.com/posts/7911 
WSI digital slide: https://kikoxp.com/posts/5894 
Sample pathology report template: https://kikoxp.com/posts/5893  
 
“Arteriovenous” Hemangioma
 
Cavernous hemangioma/Venous malformation
Video (Masson in a cavernous hemangioma/vascular malformation): https://kikoxp.com/posts/14133 
 
Glomeruloid Hemangioma 
 
Hobnail hemangioma (targetoid hemosiderotic hemangioma)
What is hobnail??? (short video): https://kikoxp.com/posts/29904 
 
Infantile Hemangioma (Cellular Hemangioma of Infancy)
 
Lobular capillary hemangioma (pyogenic granuloma; PG)
WSI digital slide (HUGE PG plus extramedullary hematopoiesis): https://kikoxp.com/posts/3746 
Video (short - HUGE PG plus extramedullary hematopoiesis): https://kikoxp.com/posts/9640 
 
Microvenular hemangioma
WSI digital slide: https://kikoxp.com/posts/3184 
 
Epithelioid hemangioma (aka angiolymphoid hyperplasia with eosinophilia) (EH/ALHE)
Video (discussed in this review video): https://kikoxp.com/posts/4927 
Video (AIP France 2021 bonus case): https://kikoxp.com/posts/8626 
Video (Australasian dermpath case 8): https://kikoxp.com/posts/21499 
WSI digital slide: https://kikoxp.com/posts/3063 
WSI digital slide (H&E, CD31, ERG - Australasian dermpath case 8): https://kikoxp.com/posts/21691 
 
Spindle cell hemangioma
WSI digital slide (best ever!): https://kikoxp.com/posts/3074 
Image (“mini fat cell”-like endothelial vacuoles clue to diagnosis): https://kikoxp.com/posts/8665 
Video (AIP France 2021 - bonus case): https://kikoxp.com/posts/8664  
Video (SCH 101 & discussion of Maffucci syndrome): https://kikoxp.com/posts/3097 
Video (SCH with “mini fat cell”-like vacuoles): https://kikoxp.com/posts/4741 
Video (SCH with phlebolith arising in a vascular malformation): https://kikoxp.com/posts/14142 
 
Venous Lake
 
Verrucous Hemangioma
 
Lymphangioma / lymphangiomatosis / lymphatic malformation
Video (discussed in this review video): https://kikoxp.com/posts/6435 
 
Kaposiform hemangioendothelioma / tufted angioma
WSI digital slide: https://kikoxp.com/posts/11805 
Video (discussed in this review video): https://kikoxp.com/posts/7911 
Images (case 2 – perfect “cannonballs”!): https://kikoxp.com/posts/8266 
Sample Pathology Report Template: https://kikoxp.com/posts/8244 
 
Retiform hemangioendothelioma
 
Papillary intralymphatic angioendothelioma (Dabska tumor)
 
Composite hemangioendothelioma
 
Kaposi sarcoma (KS)
Video (101 including clinical pics/info): https://kikoxp.com/posts/3706 
Video (short – tumor/nodular stage KS): https://kikoxp.com/posts/28067 
Video (short – tumor/nodular stage KS): https://kikoxp.com/posts/30034 
Video (short – patch stage KS): https://kikoxp.com/posts/30186 
Video (short - nodular KS with NO BLOOD vs classic example): https://kikoxp.com/posts/47038 & https://youtu.be/S-PE-L1kTNk 
WSI digital slide (plaque stage KS with perfect “promontory sign”): https://kikoxp.com/posts/15770 
WSI digital slide (tumor/nodular stage KS): https://kikoxp.com/posts/23986 
WSI digital slide (tumor/nodular stage KS – “sieve” pattern): https://kikoxp.com/posts/24862 
WSI digital slide (tumor/nodular stage KS w/ eosinophilic globules “dorf balls”): https://kikoxp.com/posts/25252 
WSI digital slide (tumor/nodular stage KS with NO erythrocytes!): https://kikoxp.com/posts/29833 
Images (KS with perfect “promontory sign”): https://kikoxp.com/posts/15769 
 
Bacillary angiomatosis 
(infectious/reactive vascular lesion, but a potential mimic of Kaposi sarcoma and angiosarcoma)
WSI digital slide: https://kikoxp.com/posts/2258 
 
Pseudomyogenic hemangioendothelioma (aka epithelioid sarcoma-like hemangioendothelioma)
Video 101 (Australasian Dermpath 2022 - Case 10): https://kikoxp.com/posts/21503 
Video (discussed in this review video): https://kikoxp.com/posts/7911 
WSI digital slide (Australasian Dermpath 2022 - Case 10): https://kikoxp.com/posts/21731 
 
Epithelioid hemangioendothelioma (EHE)
Video (EHE of liver – short): https://kikoxp.com/posts/15993  
Video (discussed in this review video): https://kikoxp.com/posts/4927
Video (Australasian Dermpath 2022 - Case 9): https://kikoxp.com/posts/21501 
WSI digital slide (EHE filling vein; CK & ERG immunostains) (Australasian Dermpath 2022 - Case 9): https://kikoxp.com/posts/21727 
WSI digital slide: https://kikoxp.com/posts/3031 
Images (blister cells in EHE - with arrows): https://kikoxp.com/posts/14008 
Images (EHE of liver with blister cells & chondromyxoid stroma): https://kikoxp.com/posts/16807 
 
Post-radiation “atypical vascular lesion” (AVL)
WSI digital slide: https://kikoxp.com/posts/3457 
 
Angiosarcoma
Video (short – angiosarcoma plus rhinophyma): https://kikoxp.com/posts/6124 
Video (CD34 negative, solid, spindle & epithelioid – AIP France 2021): https://kikoxp.com/posts/8666 
Video (solid spindle angiosarcoma with Kaposi sarcoma-like areas): https://kikoxp.com/posts/9845 
Video (epithelioid & CD34 negative) (Australasian Dermpath 2022 Case 11): https://kikoxp.com/posts/21505 
Video (short - radiation-associated angiosarcoma): https://kikoxp.com/posts/30180 
Video (short – angiosarcoma hiding in ruptured cyst YIKES): https://kikoxp.com/posts/47034 & https://youtu.be/P-oQGchrp-Y 
WSI digital slide (angiosarcoma hiding in ruptured cyst): https://kikoxp.com/posts/47032 
WSI digital slide 1: https://kikoxp.com/posts/3030 
WSI digital slide 2: https://kikoxp.com/posts/6802  
WSI digital slide 3 (CD34 negative, solid, spindle & epithelioid): https://kikoxp.com/posts/6168 
WSI digital slide 4 (epithelioid & CD34 negative) (Australasian Dermpath 2022 Case 11):  https://kikoxp.com/posts/21794 
Clinical photo (epithelioid angiosarcoma mimicking SCC or BCC clinically) (Australasian Dermpath 2022 Case 11): https://kikoxp.com/posts/21799 
Discussion of pros/cons of CD34 vs CD31 vs ERG in vascular tumors: https://kikoxp.com/posts/6167 
 
Other vascular topics: 
CD31+ Histiocytes?! Pitfall! Don't Confuse with a Vascular Neoplasm!: 5-Minute Pathology Pearls (video): https://kikoxp.com/posts/4769 
 
Pericytic (Perivascular) Tumors
 
Glomus tumor & Glomangioma/Glomuvenous Malformation
Images (large acral glomus tumor with oncocytic & clear cell change mimicking dermal duct tumor/poroma): https://kikoxp.com/posts/11793 
Video (large acral glomus tumor with oncocytic & clear cell change): https://kikoxp.com/posts/25416 
Video (short - gastric glomus tumor): https://kikoxp.com/posts/15027 
Video (discussed in this review video): https://kikoxp.com/posts/4827 
Video (glomangioma): https://kikoxp.com/posts/30182 
Images (gastric glomus tumor): https://kikoxp.com/posts/15070 
 
Myopericytoma
Video (myopericytoma vs angioleiomyoma): https://kikoxp.com/posts/26016 
 
Myofibroma & Myofibromatosis (related to myopericytoma per WHO)
Video (101 & short – Australasian dermpath 2022): https://kikoxp.com/posts/23097 
Video (discussed in this review video): https://kikoxp.com/posts/4827 
WSI digital slide: https://kikoxp.com/posts/8204 
WSI digital slide (myofibroma arising within bone of calvarium/skull): https://kikoxp.com/posts/11796 
WSI digital slide (myoid nodules but no hypercellular blue cell zones): https://kikoxp.com/posts/19374 
 
 
Smooth Muscle Tumors
 
Leiomyoma
 
“Symplastic” leiomyoma of scrotum (benign leiomyoma with nuclear atypia)
 
Angioleiomyoma (Leiomyoma, vascular type)
Video (with metaplastic fat – NOT angiomyolipoma!): https://kikoxp.com/posts/4827 
Video (discussed in this review video): https://kikoxp.com/posts/4999 
 
 
Piloleiomyoma (Leiomyoma, pilar type)
Video (discussed in this review video): https://kikoxp.com/posts/4827 
 
Smooth muscle hamartoma (vs Becker nevus)
Video (discussed in this review video): https://kikoxp.com/posts/4827 
WSI digital slide (blue nevus/smooth muscle hamartoma): https://kikoxp.com/posts/24430 
 
EBV-associated smooth muscle tumor
 
Inflammatory Leiomyosarcoma
 
Leiomyosarcoma, cutaneous (aka atypical intradermal smooth muscle neoplasm)
Video (short): https://kikoxp.com/posts/8047   
Video (discussed in this review video): https://kikoxp.com/posts/4827 
 
Leiomyosarcoma, deep somatic soft tissue
Images (pleomorphic leiomyosarcoma in renal vein/IVC): https://kikoxp.com/posts/7967 
 
 
Skeletal Muscle Tumors
 
Rhabdomyoma
Video (adult rhabdomyoma 101): https://kikoxp.com/posts/3164 
WSI digital slide (adult rhabdomyoma): https://kikoxp.com/posts/3116 
 
Embryonal rhabdomyosarcoma
 
Embryonal rhabdomyosarcoma, botryoid type
Video (Botryoid-type Embryonal RMS short): https://kikoxp.com/posts/15990 
Images (Botryoid-type Embryonal RMS with immunostains): https://kikoxp.com/posts/16004  
 
Alveolar rhabdomyosarcoma
Video (Alveolar Soft Part Sarcoma vs Alveolar RMS): https://kikoxp.com/posts/4580 
Video (alveolar RMS in skin of 80 yo woman mimicking Merkel cell carcinoma Australasian Dermpath 2022 Case 5): https://kikoxp.com/posts/21442 
WSI digital slide (alveolar RMS in skin of 80 yo woman mimicking Merkel cell carcinoma Australasian Dermpath 2022 Case 5): https://kikoxp.com/posts/21603 
WSI digital slide: https://kikoxp.com/posts/8194 
 
Pleomorphic rhabdomyosarcoma
 
Epithelioid rhabdomyosarcoma
WSI digital slide: https://kikoxp.com/posts/3744 
 
Spindle cell / sclerosing rhabdomyosarcoma
Video (short – sclerosing rhabdomyosarcoma): https://kikoxp.com/posts/12999
WSI digital slide (sclerosing rhabdomyosarcoma): https://kikoxp.com/posts/12985  
 
Ectomesenchymoma
 
 
Gastrointestinal stromal tumor (GIST)
 
 
Chondro-Osseous Tumors
 
Soft tissue chondroma (aka chondroma of soft parts)
Video (discussed in this review video): https://kikoxp.com/posts/4827 
WSI digital slide: https://kikoxp.com/posts/8268 
 
Extraskeletal osteosarcoma
 
Peripheral Nerve Sheath Tumors
 
Schwannoma (Neurilemmoma)
Video (ancient schwannoma): https://kikoxp.com/posts/25440 
Video (short - PEN vs schwannoma): https://kikoxp.com/posts/25546 
Video (discussed in this review video): https://kikoxp.com/posts/4999 
Video (discussed in this review video): https://kikoxp.com/posts/4927
Video (with ancient change – short): https://kikoxp.com/posts/40420  
WSI digital slide (schwannoma with ancient change): https://kikoxp.com/posts/11804 
Images (schwannoma in skin – uncommon location): https://kikoxp.com/posts/8892  
Images (recognizing subtle nuclear palisading in schwannoma): https://kikoxp.com/posts/15193 
Images (serpiginous Verocay bodies and rounded Schwann cells): https://kikoxp.com/posts/18032 
 
Neurofibroma (NF)
Video (NF 101, Neurofibromatosis/NF1, & Low Grade MPNST): https://kikoxp.com/posts/4091 
Video (short – plexiform NF arising in NF1): https://kikoxp.com/posts/4584 
Video (short 2 - plexiform neurofibroma NF1): https://kikoxp.com/posts/15037 
Video (short 3 – diffuse neurofibroma mimicking DFSP): https://kikoxp.com/posts/15038 
Video (pigmented, diffuse, & plexiform neurofibroma): https://kikoxp.com/posts/4999 
Video (diffuse NF w/ round cells, tiger stripe pattern, Wagner-Meissner): https://kikoxp.com/posts/17311 
Video (short – NF with floret cells): https://kikoxp.com/posts/14143 
Images (Wagner-Meissner bodies in diffuse neurofibroma): https://kikoxp.com/posts/8156 
Images (BEST EVER Wagner-Meissner bodies in diffuse neurofibroma): https://kikoxp.com/posts/8494 
WSI digital slide (diffuse NF round cells, tiger stripe, Wagner-Meissner): https://kikoxp.com/posts/17345 
WSI digital slide (plexiform neurofibroma in NF1): https://kikoxp.com/posts/24672 
Images (gross photos - plexiform neurofibroma in NF1 “bag of worms”): https://kikoxp.com/posts/24674 
 
 
Granular cell tumor
Images (granular cell tumor with perineural involvement – benign): https://kikoxp.com/posts/8186 
Video (granular cell tumor with perineural involvement – benign): https://kikoxp.com/posts/11641 
Video (granular cell tumor of tongue mimicking SCC at 1:09:59): https://kikoxp.com/posts/4999 
Video (short 3 – granular cell tumor with PEH mimicking SCC): https://kikoxp.com/posts/8113 
Video (discussed in this review video): https://kikoxp.com/posts/4827 
WSI digital slide (granular cell tumor with perineural involvement): https://kikoxp.com/posts/17759 
 
Dermal nerve sheath myxoma (formerly conventional/myxoid neurothekeoma)
Video (nerve sheath myxoma vs cellular neurothekeoma 101): https://kikoxp.com/posts/4103 
Video (w/ Verocay body palisading - short): https://kikoxp.com/posts/15994  
Video (discussed in this review video): https://kikoxp.com/posts/4999 
Images (w/ Verocay body palisading):https://kikoxp.com/posts/16056 
Images (AMAZING gross photo & corresponding H&E): https://kikoxp.com/posts/20986 
 
Solitary circumscribed neuroma (palisaded encapsulated neuroma) (SCN/PEN)
Video (short - PEN vs schwannoma): https://kikoxp.com/posts/25546 
Video (discussed in this review video): https://kikoxp.com/posts/4999 
 
Traumatic neuroma
Video (discussed in this review video): https://kikoxp.com/posts/4999 
Video (short – plus nerve histology discussion): https://kikoxp.com/posts/40416 
WSI digital slide (arising from large nerve): https://kikoxp.com/posts/8018 
 
Perineurioma
Video (perineurioma 101): https://kikoxp.com/posts/3694 
Video (sclerosing perineurioma discussed in this review video): https://kikoxp.com/posts/4999 
Video (short - perineurioma with immunostains): https://kikoxp.com/posts/10073 
WSI digital slide: https://kikoxp.com/posts/22546 
WSI digital slide: https://kikoxp.com/posts/23206 
WSI digital slide (sclerosing perineurioma): https://kikoxp.com/posts/3676 
WSI digital slide (perineurioma with immunostains): https://kikoxp.com/posts/8021 
 
Ectopic meningioma & meningothelial hamartoma
 
Benign Triton tumor / neuromuscular choristoma
 
Hybrid nerve sheath tumor
 
Malignant peripheral nerve sheath tumor (MPNST)
Video (MPNST 101): https://kikoxp.com/posts/4092 
Video (Low grade MPNST - 38:00): https://kikoxp.com/posts/4091
Video (short – Triton MPNST w/ rhabdomyoblastic differentiation): https://kikoxp.com/posts/15995 
Video (short – MPNST arising in plexiform neurofibroma): https://kikoxp.com/posts/12994 
Video (intraneural epithelioid MPNST) (Australasian Dermpath Case 12): https://kikoxp.com/posts/21508 
WSI digital slides (MPNST arising in plexiform neurofibroma): https://kikoxp.com/posts/12967 
WSI digital slides (intraneural epithelioid MPNST) (Australasian Dermpath Case 12):
Images (Triton MPNST with HUGE rhabdomyoblasts): https://kikoxp.com/posts/16855 
Images (Triton MPNST with perfect cross striated rhabdomyoblasts): https://kikoxp.com/posts/17897 
 
 
Malignant melanotic nerve sheath tumor (formerly “melanotic schwannoma”)
 
 
Tumors of Uncertain Differentiation
 
Cellular neurothekeoma
Video (nerve sheath myxoma vs cellular neurothekeoma 101): https://kikoxp.com/posts/4103 
Video (discussed in this review video): https://kikoxp.com/posts/4999 
Video (atypical cellular neurothekeoma Australasian Dermpath 2022 - Case 4): https://kikoxp.com/posts/21440 
WSI digital slide (atypical cellular neurothekeoma): https://kikoxp.com/posts/17751 
WSI digital slide (atypical cellular neurothekeoma Australasian Dermpath 2022 - Case 4): https://kikoxp.com/posts/21601 
 
 
Intramuscular myxoma
WSI digital slides: https://kikoxp.com/posts/8222 
 
Juxta-articular myxoma
 
Superficial angiomyxoma (cutaneous myxoma)
WSI digital slides (x3): https://kikoxp.com/posts/3955 
WSI digital slide: https://kikoxp.com/posts/21103 
Sample Pathology Report Template: https://kikoxp.com/posts/3964 
 
Deep (“aggressive”) angiomyxoma
WSI digital slides: https://kikoxp.com/posts/4598 
 
Atypical fibroxanthoma & pleomorphic dermal sarcoma
Video (101- AFX/PDS vs spindle SCC vs spindle melanoma): https://kikoxp.com/posts/4238  
Video (short – AFX vs PDS): https://kikoxp.com/posts/4587 
WSI digital slide: https://kikoxp.com/posts/6840 
Sample Pathology Report Template: https://kikoxp.com/posts/5193 
 
Angiomatoid fibrous histiocytoma
Video (fragmented AFH; Australasian dermpath case 7): https://kikoxp.com/posts/21497 
WSI digital slide (fragmented AFH; Australasian dermpath case 7): https://kikoxp.com/posts/21612 
WSI digital slide (classic textbook example): https://kikoxp.com/posts/15812 
Images (classic textbook example): https://kikoxp.com/posts/15815 
Sample Pathology Report Template: https://kikoxp.com/posts/15814 
 
Ossifying fibromyxoid tumor (OFMT)
 
Myoepithelioma, myoepithelial carcinoma, & mixed tumor
Video (discussed in this review video): https://kikoxp.com/posts/4827 
Video (discussed in this review video): https://kikoxp.com/posts/2767 
 
Cutaneous syncytial myoepithelioma
WSI digital slide: https://kikoxp.com/posts/53106 
 
Pleomorphic hyalinizing angiectatic tumor of soft parts (PHAT)
 
Hemosiderotic fibrolipomatous tumor
 
Phosphaturic mesenchymal tumor
 
NTRK-rearranged spindle cell neoplasm 
WSI digital slides: https://kikoxp.com/posts/6790 
Sample pathology report template: https://kikoxp.com/posts/5897 
Video (AIP France 2021- Case 16): https://kikoxp.com/posts/8564 
Handout & figure images (AIP France 2021- Case 16): https://kikoxp.com/posts/8565 
 
Synovial sarcoma
Video (short - biphasic synovial sarcoma): https://kikoxp.com/posts/4685 
Video (short – monophasic synovial sarcoma perfect herringbone): https://kikoxp.com/posts/12992 
Video (short – cystic synovial sarcoma): https://kikoxp.com/posts/15026 
WSI digital slide (biphasic synovial sarcoma): https://kikoxp.com/posts/8229 
WSI digital slide (monophasic synovial sarcoma perfect herringbone): https://kikoxp.com/posts/12966 
Image (biphasic with striped pattern & immunostains I like for synovial): https://kikoxp.com/posts/11073 
Image (tricky monophasic synovial sarcoma bland & benign-appearing!): https://kikoxp.com/posts/11075 
 
Epithelioid sarcoma
Video (short – with immunostains): https://kikoxp.com/posts/12995  
Video (discussed in this review video): https://kikoxp.com/posts/7960 
WSI digital slide: https://kikoxp.com/posts/6791 
WSI digital slide (with immunostains): https://kikoxp.com/posts/12978 
WSI digital slides (hand amputation with lymph node metastasis): https://kikoxp.com/posts/20577  
 
Alveolar soft part sarcoma (ASPS)
Video (ASPS vs Alveolar Rhabdomyosarcoma): https://kikoxp.com/posts/4580 
WSI digital slides: https://kikoxp.com/posts/8197 
 
Clear cell sarcoma of soft tissue
WSI digital slide (clear cell sarcoma on tendon; AIP France 2021 case 11): https://kikoxp.com/posts/6792 
WSI digital slide (dermal, with tons of wreath-like tumor giant cells!): https://kikoxp.com/posts/8455 
Video (AIP France 2021 – case 11): https://kikoxp.com/posts/8502 
Handout & images (AIP France 2021 – case 11): https://kikoxp.com/posts/8503 
 
Cutaneous melanocytic tumor with CRTC1::TRIM11 fusion 
(may mimic clear cell sarcoma)
WSI digital slide (AIP France 2021 – Case 10): https://kikoxp.com/posts/7015 
Video (AIP France 2021 – Case 10): https://kikoxp.com/posts/8495 
Handout & figure images (AIP France 2021 – Case 10): https://kikoxp.com/posts/8496 
 
Extraskeletal myxoid chondrosarcoma
WSI digital slide: https://kikoxp.com/posts/8267 
 
Desmoplastic small round cell tumor
 
Extrarenal rhabdoid tumor
 
PEComa, including angiomyolipoma of kidney
Video (cutaneous PEComa 101): https://kikoxp.com/posts/4378 
Video (angiomyolipoma AML - short): https://kikoxp.com/posts/16799 
WSI digital slide: https://kikoxp.com/posts/8441 
 
Intimal sarcoma
 
Undifferentiated sarcoma / Undifferentiated pleomorphic sarcoma (UPS)
WSI digital slide: https://kikoxp.com/posts/6841 
H&E Images (UPS with BIZARRE pleomorphism & emperipolesis): https://kikoxp.com/posts/10213 
Sample Pathology Report Template (biopsy): https://kikoxp.com/posts/9915 
Sample Pathology Report Template (resection): https://kikoxp.com/posts/9916 
 
 
 
Undifferentiated Small Round Cell Sarcomas of Bone & Soft Tissue
 
Ewing sarcoma
Video (primary cutaneous Ewing sarcoma Australasian Dermpath 2022 Case 6): https://kikoxp.com/posts/21444 
WSI digital slide (primary cutaneous Ewing sarcoma Australasian Dermpath 2022 Case 6): https://kikoxp.com/posts/21608 
 
Round cell sarcoma with EWSR1-non-ETS fusions
 
CIC-rearranged sarcoma
 
Sarcoma with BCOR genetic alterations
 
 
 
BONE TUMORS
 
Chondrogenic (Cartilagenous) Tumors
 
Subungual exostosis
 
Bizarre parosteal osteochondromatous proliferation (Nora lesion)
 
Periosteal chondroma
 
Enchondroma
Video: https://kikoxp.com/posts/4178 (Chondrosarcoma vs Enchondroma: Bone Pathology with Dr. Andrew Rosenberg
Video (enchondroma of small bones in hands/feet): https://kikoxp.com/posts/12988 
WSI digital slide (enchondroma of small bones in hands/feet): https://kikoxp.com/posts/12956 
 
Osteochondroma
 
Chondroblastoma
Video (discussed in this review video): https://kikoxp.com/posts/9336 
WSI digital slide: https://kikoxp.com/posts/4604 
 
Chondromyxoid fibroma
Video (discussed in this review video): https://kikoxp.com/posts/9337 
WSI digital slide: https://kikoxp.com/posts/4606 
 
Osteochondromyxoma
 
Synovial chondromatosis
WSI digital slide: https://kikoxp.com/posts/20575 
 
Central atypical cartilaginous tumor / chondrosarcoma, grade 1
Video: https://kikoxp.com/posts/4178 (with Dr. Andrew Rosenberg)
Video (discussed in bone pathology 101 video): https://kikoxp.com/posts/7674
 
Secondary peripheral atypical cartilaginous tumor / chondrosarcoma, grade 1
Video: https://kikoxp.com/posts/4435 (with Dr. Andrew Rosenberg)
 
Central Chondrosarcoma, grades 2 and 3
Video (discussed in bone pathology 101 video): https://kikoxp.com/posts/7674
Video (chondrosarcoma of foot – amputation specimen): https://kikoxp.com/posts/12990 
WSI digital slide (chondrosarcoma of foot – amputation specimen): https://kikoxp.com/posts/12958 
Gross pathology images (chondrosarcoma of foot – amputation specimen): https://kikoxp.com/posts/13019 
WSI digital slides (dedifferentiated spindle cell melanoma with osteosarcomatous and chondrosarcomatous heterologous differentiation): https://kikoxp.com/posts/11795 
Video (dedifferentiated spindle cell melanoma with osteosarcomatous and chondrosarcomatous heterologous differentiation): https://kikoxp.com/posts/25416 
 
Secondary peripheral chondrosarcoma, grades 2 and 3
 
Periosteal chondrosarcoma
 
Clear cell chondrosarcoma
WSI digital slide: https://kikoxp.com/posts/8269 
 
Mesenchymal chondrosarcoma
Video (discussed in this review video): https://kikoxp.com/posts/9107
WSI digital slides: https://kikoxp.com/posts/5130 
 
Dedifferentiated chondrosarcoma
Video (discussed in this review video): https://kikoxp.com/posts/9108 
WSI digital slides (dediff chondrosarcoma w/ heterologous osteosarcomatous component…very dramatic example): https://kikoxp.com/posts/5131. Gross photo of hemipelvectomy: https://kikoxp.com/posts/5132 
 
Osteogenic Tumors
 
Osteoma
 
Osteoid osteoma
 
Osteoblastoma
 
Low-grade central osteosarcoma
 
Osteosarcoma
Video (osteosarcoma 101): https://kikoxp.com/posts/4499 
Video (conventional & chondroblastic osteosarcoma - discussed in bone pathology 101 video): https://kikoxp.com/posts/7674
Image (osteoblastic osteosarcoma with “jellyfish” osteoclast): https://kikoxp.com/posts/8511 
WSI digital slides (dedifferentiated spindle cell melanoma with osteosarcomatous and chondrosarcomatous heterologous differentiation): https://kikoxp.com/posts/11795 
Video (dedifferentiated spindle cell melanoma with osteosarcomatous and chondrosarcomatous heterologous differentiation): https://kikoxp.com/posts/25416 
 
 
Parosteal osteosarcoma
 
Periosteal osteosarcoma
 
High-grade surface osteosarcoma
 
Secondary osteosarcoma
 
Fibrogenic Tumors
 
Desmoplastic fibroma of bone
 
Fibrosarcoma of bone
 
Vascular Tumors of Bone
 
Hemangioma of bone
 
Epithelioid hemangioma of bone
 
Epithelioid hemangioendothelioma of bone
 
Angiosarcoma of bone
 
Osteoclastic Giant Cell-Rich Tumors
 
Aneurysmal bone cyst (ABC)
 
Giant cell tumor of bone
 
Non-ossifying fibroma (NOF/metaphyseal fibrous defect/fibrous cortical defect)
WSI digital slide: https://kikoxp.com/posts/12982 
 
Notochordal Tumors
 
Benign notochordal cell tumor
 
Conventional chordoma
Video (“bicycle chain” sign of Jung): https://kikoxp.com/posts/4589 
WSI digital slides: https://kikoxp.com/posts/8265 
WSI digital slide: https://kikoxp.com/posts/20299 
Images (physaliferous cells in extra-axial soft tissue chordoma): https://kikoxp.com/posts/18131 
 
Dedifferentiated chordoma
 
Poorly differentiated chordoma
 
Other Mesenchymal Tumors of Bone 
 
Chondromesenchymal hamartoma of chest wall
 
Osteofibrous dysplasia
 
Adamantinoma of long bones
WSI digital slide: https://kikoxp.com/posts/24370 
 
Solitary bone cyst (simple bone cyst, unicameral bone cyst [UBC])
WSI digital slide: https://kikoxp.com/posts/40404 
 
Fibrocartilaginous mesenchymoma
 
Fibrous dysplasia 
WSI digital slide: https://kikoxp.com/posts/22455 
 
Lipoma & hibernoma of bone
 
Leiomyosarcoma of bone
 
Undifferentiated pleomorphic sarcoma
 
Bone metastasis
 
Images (metastatic adenoid cystic carcinoma from parotid primary): https://kikoxp.com/posts/8385 
 
Hematopoietic Neoplasms of Bone
 
Solitary plasmacytoma of bone
 
Primary non-Hodgkin lymphoma of bone
 
 
Other Histiocytic & Fibrohistiocytic Entities 
 
Erdheim-Chester disease
 
Juvenile xanthogranuloma (JXG; aka solitary xanthogranuloma)
Video (short 2 – JXG without Touton giant cells): https://kikoxp.com/posts/26270 
Video (discussed in this review video): https://kikoxp.com/posts/4999 
Video (discussed in this review video): https://kikoxp.com/posts/4927
Video (discussed in this review video): https://kikoxp.com/posts/7960 
 
Reticulohistiocytoma/Multicentric Reticulohistiocytosis
Video (discussed in this review video): https://kikoxp.com/posts/7960 
 
Langerhans cell histiocytosis (LCH)
Video (short – LCH vs mastocytosis): https://kikoxp.com/posts/6760 
Video (LCH vs mastocytosis - discussed in this review video): https://kikoxp.com/posts/6434 
Video (discussed in this review video): https://kikoxp.com/posts/7960 
Images (photos of LCH from multiple cases): https://kikoxp.com/posts/22380 
 
Rosai-Dorfman Disease (RDD)
Video (fibrotic burnt out RDD mimicking “inflammatory pseudotumor”): https://kikoxp.com/posts/6290 
Video (RDD of bone - short): https://kikoxp.com/posts/16804 
Video (discussed in this review video): https://kikoxp.com/posts/4999 
Video (discussed in this review video): https://kikoxp.com/posts/7960 
WSI digital slide: https://kikoxp.com/posts/24393 
 
 
Deposition Diseases & Related Entities
 
Polyethylene wear particle deposition (from arthroplasty/knee replacement hardware) 
WSI digital slide: https://kikoxp.com/posts/11799 
 
Gaucher disease involving bone
WSI digital slide: https://kikoxp.com/posts/12983 
 
Amyloidosis involving bone
WSI digital slide (extensive amyloid in femoral head in systemic amyloidosis): https://kikoxp.com/posts/24384 
 
 
 
Bone Lesions of the Mandible, Maxilla, and Oral Cavity  
 
Juvenile psammomatoid ossifying fibroma (JPOF) 
 
 
Miscellaneous Entities 
(some of these are not bone/soft tissue tumors per se, but are important mimics)
 
Desmoplastic melanoma 
Video (short - Desmoplastic vs Spindle Cell Melanoma): https://kikoxp.com/posts/6046 
Video (discussed in this review video): https://kikoxp.com/posts/6963 
WSI digital slide (neurotropic desmoplastic melanoma): https://kikoxp.com/posts/9861 
WSI digital slide: https://kikoxp.com/posts/5125 
WSI digital slide: https://kikoxp.com/posts/6793 
WSI digital slide (subtle desmo with melanoma in situ): https://kikoxp.com/posts/20106 
WSI digital slide (desmoplastic melanoma mimicking neurofibroma): https://kikoxp.com/posts/18999 
WSI digital slide (combined desmo & conventional in parotid gland): https://kikoxp.com/posts/19001 
WSI digital slide (Huge acral melanoma with conventional, spindle cell, & desmoplastic areas): https://kikoxp.com/posts/20108 
WSI digital slide (desmoplastic & spindle cell– AIP France case 9): https://kikoxp.com/posts/7014
Video (desmoplastic & spindle cell– AIP France case 9): https://kikoxp.com/posts/8473
Handout & images (desmoplastic & spindle cell– AIP France case 9): https://kikoxp.com/posts/8472
Sample pathology report template: https://kikoxp.com/posts/8472
 
 
Spindle cell melanoma
Video (AFX vs spindle melanoma vs spindle SCC): https://kikoxp.com/posts/4238 
Video (short - Desmoplastic vs Spindle Cell Melanoma): https://kikoxp.com/posts/6046 
Video (short – with “nesticle” explanation) https://kikoxp.com/posts/9842 
WSI digital slide: https://kikoxp.com/posts/5126 
WSI digital slide (nice packeted nest/fascicle ‘nesticle’ pattern): https://kikoxp.com/posts/6794 
WSI digital slide (desmoplastic & spindle cell– AIP France case 9): https://kikoxp.com/posts/7014
WSI digital slide (with swirling fascicles/nesticles): https://kikoxp.com/posts/19196 
WSI digital slide (Huge acral melanoma with conventional, spindle cell, & desmoplastic areas): https://kikoxp.com/posts/20108 
Video (desmoplastic & spindle cell– AIP France case 9): https://kikoxp.com/posts/8473
Handout & images (desmoplastic & spindle cell– AIP France case 9): https://kikoxp.com/posts/8472
WSI digital slide (dedifferentiated spindle cell melanoma with osteosarcomatous and chondrosarcomatous heterologous differentiation): https://kikoxp.com/posts/11795 
Video (dedifferentiated melanoma with osteosarcomatous and chondrosarcomatous heterologous differentiation): https://kikoxp.com/posts/25416 
 
 
Paraganglioma/Pheochromocytoma
Video (101 – carotid body parganglioma): https://kikoxp.com/posts/40426 
Images (paraganglioma with perfect zellballen pattern): https://kikoxp.com/posts/15107 
WSI digital slides (paraganglioma with adjacent ganglion): https://kikoxp.com/posts/17493 
WSI digital slides (paraganglioma "glomus vagale" with nice s100+ sustentacular cells and keratin expression – H&E and immunostains): https://kikoxp.com/posts/17494 
 
 
Other Pathology Topics
 
Hemepath & Hematology Board Review: Peripheral Blood Smears with Dr. Jeanette Ramos: https://kikoxp.com/posts/3726 
Hemepath Basics: Non-Neoplastic Lymph Node Histology & Immunostains with Dr. Jeanette Ramos: https://kikoxp.com/posts/4068 
Common Hematopathology Immunostains & Flow Cytometry Markers Chart: https://kikoxp.com/posts/20554 
Purkinje Cells in Cerebellum - Neurofilament immunostain: https://kikoxp.com/posts/6351 
Retinoblastoma: gross and microscopic images: https://kikoxp.com/posts/4321