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March 1957


AMA Arch Derm. 1957;75(3):444-454. doi:10.1001/archderm.1957.01550150132024

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Porokeratosis of Mibelli. Presented by Dr. Orlando Canizares, New York.

Patient: White man, Aged 66.

Complaint: Eruption on inner aspect of left thigh, right axilla, hand, scalp, scrotum, and penis, of 56 years' duration.

History: The patient first noticed a lesion on the left thigh at the age of 10 years and has since been slowly developing new lesions. Once a lesion completely develops, it remains permanently unchanged. The lesions are pruritic. There is no familial history of a similar eruption.

Description: The lesions are well demarcated and present at their border a sharply elevated keratotic wall enclosing a slightly atrophic area. There is a dry thin crust which appears to develop from a slender furrow running along the summit of the keratotic wall. The configurations of the lesions vary with their location. Those on the thigh have a linear arrangement and are about 10 cm. long.

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