Becker's melanosis in a woman

Becker's melanosis is a relatively common, benign hamartoma, which is usual ly characterized by a hyperpigmented, hypertrichotic patch on the upper tru nk or proximal upper extremities of males, with its onset during the peripu bertal years. Commonly, there is an associated smooth muscle hamartoma on h istology. We present a woman with a Beckers melanosis on the leg without hy pertichosis. We believe that the spectrum of Becker's nervus is greater tha n commonly thought and that cases similar to ours are not rare, but have be en diagnosed as other conditions.