Acquired hypertrichosis lanuginosa.

Acquired hypertrichosis lanuginosa occurred in a man with lung cancer. Fine lanugo-like hair covered his face, trunk, and extremities, and there were marked pigmentation of oral mucous membrane and a painful red tongue. Our study revealed a high concentration of carcinoembryonic antigen (CEA) in the serum of the patient. We considered that CEA might be an important etiological factor of this disease.