Atypical Spitz tumour with positive sentinel lymph node.

A 16-year-old young man presented with an atypical Spitz tumour of the left buttock with involvement of the left inguinal sentinel node. After inguinal lymphadenectomy, none among the further 21 left inguinal lymph nodes excised was positive. The patient has been free of disease for 39 months.

Malignant transformation of intramedullary melanocytoma: case report.

Objective: Meningeal melanocytomas are low-grade primary melanocytic tumors with benign histological features and a favorable clinical prognosis. Transition from meningeal melanocytoma to primary melanoma of the central nervous system is exceptionally rare, with only 5 cases having been previously reported. Here, we discuss a case of malignant transformation of an intramedullary melanocytoma to primary melanoma and review the pertinent literature.