Keil,1 in an extensive study of parapsoriasis en plaques disséminées and incipient mycosis fungoides, suggested that the former dermatosis probably is the precursor of the latter in most, if not all, cases. Wise and Sulzberger,2 commenting on this observation, stated the belief that the incidence of mycosis fungoides would be much greater in a given community if this were true. They have, however, observed some cases of parapsoriasis en plaques in which there finally appeared, after years, clinical as well as microscopic evidence of mycosis fungoides. Fox,3 in 1913 reported a case of mycosis fungoides following psoriasis.
The case to be described here is deemed worthy of report since long-standing psoriasis was followed by mycosis fungoides.
REPORT OF A CASE
J. S., a Jew 45 years of age, had, except for a dermatosis, enjoyed good health. The eruption started thirty-four years before I saw him,
Schonberg IL. GENERALIZED EXFOLIATIVE PSORIASIS AND MYCOSIS FUNGOIDES. Arch Derm Syphilol. 1940;41(1):119–120. doi:10.1001/archderm.1940.01490070122013
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