[Malignant melanoma of the penile fossa navicularis].

A case of a malignant melanoma of the orificium externum urethrae in a 53-year-old man is reported. This is a very rare localisation of such a tumor. Already at the beginning of therapy the tumor was ulcerated. Histological investigation showed a very cellular faintly pigmented tumor. The prognosis is poor. Modern therapy is discussed.