Answer & video explanation:  https://kikoxp.com/posts/4684
Another video about this entity: https://kikoxp.com/posts/8692

A complete organized library of all my videos, digital slides, pics, & sample pathology reports is available here: https://kikoxp.com/posts/5084 (dermpath) & https://kikoxp.com/posts/5083 (bone/soft tissue sarcoma pathology).