Case Number : Case 1517 - 18 April Posted By: Guest

I dont find this case that simple, at first glance i thought of a xanthoma (maybe tuberous) but after reviewing the majority of the cells are fusiform with a tendency to dispose in fascicles and in a storiform fashion, there is a grenz zone and is hard to tell but would like to see the epidermis adjacent to the lesión to compare as I think there is some epidermal induction. I think this is a case of dermatofibroma with cholesterol clefts (rare but can happen) and xanthomization the clinical impression could help

I think this is a Giant cell tumor of tendon sheath. Here we can see the foam cells, some multinucleated cells and colesterol clefts.

"I think this is a case dermatofibroma with cholesterol clefts"...Agree with Raul!!!  I don't see any dermal necrobiosis neither lesion comes from periorbital region. 

Solitary spindle cell xanthogranuloma.  Dermatofibromas are rare on the digits and I don't see entrapped collagen bundles. 

Favour a dermatofibroma. Agree with the differentials.

Agree with Raul, Mona et al.  Haemosiderin is a good clue too.