Mycosis fungoides presenting as areas of hypopigmentation: a report of three cases.

In three patients with histologically documented mycosis fungoides, all or most of the lesions were hypopigmented. Unsuspected microscopic foci of mycosis fungoides were found in a purely macular hypopigmented area in one of these patients who had been treated with vitiligo 15 years earlier. Two of the patients were black, and one was Latin American. Repigmentation in all patients followed treatment with carmustine (BCNU) and mechlorethamine.