[Primary malignant melanoma of the penis. Considerations apropos of a case]

The authors present a case of primitive malignant melanoma of the penis. At the same time they make a review of the world bibliography on this illness, in which they find only 50 cases published. They make a series of comments on the peculiar evolution of the case presented, in comparison to those described. They feel that the most important factor of the case presented is its rarity and the diagnostic difficulties involved.