dermal melanoma
Histologic Features
- A symmetrical dermal-based melanocytic proliferation with smooth border
- Absence of an intraepidermal proliferaton of melanocytes
- A grenz zone of non-involvement
- An expansile proliferaton of epithelioid/spindle melanocytes in the dermis
- Prominent cytologic atypia, mitoses and necrosis
- Absence of regression
Updated Wednesday, July 31, 2013 8:30:48 PM