[Ultrastructure of human skin melanomas].

Sixty invasive melanomas of human skin including 30 nodular, 28 extending superficially and 2 lentigo-melanomas were studied. The results indicate that electron microscopy may be efficiently used for differential diagnosis of melanomas and poorly differentiated tumors of other histogenesis. Some ultrastructural differences between lentigo-melanoma, melanoma extending superficially and nodular melanomas were found.