A complete organized library of all my videos, digital slides, pics, & sample pathology reports is available here: kikoxp.com/posts/5084 (dermpath) & kikoxp.com/posts/5083 (bone/soft tissue sarcoma pathology).
All I can do is salute you king of pathology pedagogy! ...and subscribe, and put a like on every video, and on every positive comment of every video. Immeasurable gratitude from Sweden!
do you have a general approach to these types of lesions? i.e. how do you generate a differential? ...or do I just need to memorize 38 different kinds of cysts/lesions..?
Figuring out what type of lining epithelium the cyst has is the first step. Then see if there are adnexal structures attached to the cyst. Then check your anatomic site. Those help narrow down the differential a lot and make it easier to search textbook to see what you are dealing with.
Presence of Plasma cells is one difference. But in SCAP The spaces are truly ductal/glandular. They are lined by double layer cuboidal to columnar epithelium often with apical snouts. In warty dyskeratoma, the spaces are not truly glands or ducts but rather are the result of acantholysis and dyskeratosis. You will see corps ronds and grains (dyskeratosis) in warty dyskeratoma but not in scap. I have more videos about both entities here kikoxp.com/posts/5084
