It is a well recognized fact that the administration of arsphenamin may produce definite dermatoses of which the most familiar type is the erythematous eruption, which in some instances develops into an exfoliative dermatitis.
Recently Queyrat, Louis, and Rabut,1 Kleeberg,2 Buschke and Freymann,3 and Keller,4 have reported cases of arsphenamin dermatitis with lichenoid lesions. The following case is reported because, following treatment by arsphenamin, the patient developed a condition which in its clinical appearance, in the histology of the lesions, and in the course of the disease was indistinguishable from true lichen planus. While the possibility that this was a mere coincidence cannot be excluded, the evidence to be presented favors the assumption that the eruption was caused by arsphenamin.
REPORT OF CASE
History.—
A mulatto woman, aged 40, married, was admitted to the out-patient department of the Presbyterian Hospital, June 1, 1921, complaining of a