31 Jan
A Case of Melanoacanthoma: DISCUSSION continue
Melanoacanthoma’s histopathologic appearance is very helpful in diagnosis, and is characterized by a hyperplastic epidermis, large dendritic melanocytes and nonpigmented keratinocytes. Numerous large dendritic melanin-laden melanocytes were spread throughout the tumor at all levels of spinous layer. This case also showed these histopathologic features, and positive staining with S-100 protein, HMB-45 and Fontana-Masson. Differential diagnoses [...]