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Parapsoriasis (en plaque type)?
Presented by Dr. Nelson Paul Anderson and Dr. O. M. Stout (by invitation).N. P., a white man aged 48, presents an eruption which began in 1932 as small brown macules on the medial aspects of both thighs. They gradually increased in size and number until the upper parts of both thighs became involved. More recently the medial and posterior aspects of both arms have shown similar lesions. The lesions are light brown slightly erythematous scaling macules which coalesce into large plaques.The blood count was normal, and urinalysis gave negative results. The Wassermann reactions of the blood and the spinal fluid were positive. The patient has been under treatment for meningovascular syphilis since 1933. Local treatment has consisted of the application of Mook's lotion, salicylic acid and sulfur ammoniated mercury and crude coal tar.
Dr. Samuel Ayers Jr.: I think the lesions are compatible
Frost K, Caskey CR. LOS ANGELES DERMATOLOGICAL SOCIETY. Arch Derm Syphilol. 1940;41(2):441–444. doi:10.1001/archderm.1940.01490080250019
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