Hypopigmented mycosis fungoides. Speculations about the mechanism of hypopigmentation.

Hypopigmented, nonatrophic macules are an unusual manifestation of lesions of early mycosis fungoides. Presented herein is a patient with such lesions and an unusual mask-like hypopigmentation of the face. We review both the clinical and microscopic findings in this patient and in previously reported patients with hypopigmented lesions of mycosis fungoides. Finally, speculation is made as to the mechanisms of the hypopigmentation.