malignant-blue-nevus

Two subtypes Clinical features •Usually slowly growing tumors •Predilection for the scalp •M>F •No age predilection & exceptionally, lesions can develop in children •High grade tumor probably related to delay in diagnosis & hence marked tumor thickness •Metastases develop in around 50% of cases to lymph nodes, lung & liver Histological features •Develops within a precursor lesion as one or more nodules of epithelioid or spindled cell melanoma •Or melanoma showing admixed blue nevus-like…