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Parapsoriasis en Plaque. Presented by Dr. Max Popper.
L. G. W. is a 7-year-old white boy, born in the United States, whose past history is non-contributory to his present illness. The skin changes consist of a number of plaques, irregularly distributed over the skin, with only slight tendency toward symmetrical localization. The first of these lesions appeared two years ago on the dorsum of the left foot. Other plaques developed later on the abdomen, legs, and a wrist. The patches are almost level with the skin, are round, and have a sharp and irregular border, which is slightly elevated peripherally. The lesions vary from 2 to 1/2 in. (5 to 1.3 cm.) in diameter and are sepia brown; the surface is smooth and not scaly. The lesions are not pruritic.
Biopsy findings indicate marked and uniform hyperkeratosis, with occasional hyperkeratotic plugging of follicles. There is no parakeratosis. The granular
Harold C. Fishman, Stanton B. May, Fred F. Feldman. METROPOLITAN DERMATOLOGICAL SOCIETY OF LOS ANGELES. AMA Arch Derm Syphilol. 1953;68(3):348–349. doi:10.1001/archderm.1953.01540090110019