Acquired hypertrichosis lanuginosa. A skin marker of internal malignancy.

A 54-year-old woman had acquired hypertrichosis lanuginosa. She developed excessive growth of lanugo-like hair all over her body two years prior to the sudden appearance of a rapidly growing, localized, solid mammary tumor. Of 12 published cases, nine have been associated with an internal malignant neoplasm and obviously, as in the present case, the cutaneous symptoms may serve as a skin marker by preceding the tumor diagnosis for up to two years.