Pigmented epithelioid melanocytoma: A case report.

Pigmented epithelioid melanocytoma (PEM) is a term proposed by Zembowicz et al to encompass a rare low-grade melanocytic tumor very similar to lesions previously designated as epithelioid blue nevus and animal-type melanoma. PEM consists clinically of epithelioid, pleomorphic, atypical cells with heavy pigmentation[[1]] and histopathological studies have demonstrated a dermal proliferation of heavily pigmented melanocytes, both dendritic and spindle/epithelioid, admixed with melanophages.[3] The entity frequently presents regional lymph node involvement. The term PEM encompasses a rare low-grade melanocytic tumor with frequent regional lymph node involvement. [Extracted from the article]