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September 1972

The Black Keratinous CystA Sign of Hemochromatosis

Author Affiliations


From the Department of Dermatology, University of Pennsylvania School of Medicine, Philadelphia.

Arch Dermatol. 1972;106(3):379-381. doi:10.1001/archderm.1972.01620120063015

A Negro patient had three keratinous cysts that were becoming progressively darker and signalled the onset of hemochromatosis. No change in skin color was noted by the patient. The dark color was shown to be melanin rather than a hemorrhage, as was clinically suspected. Such a sequence of events provided a distinct aid in detecting abnormal pigmentation in a darkskinned Negro.