Psoriasis, according to the statistics of the American Dermatological Association, constitutes about 2.7 per cent, of all skin diseases. It is fairly common in the white race, so much so as to attract but little attention. Among colored people, on the contrary, this dermatosis is so rare that some American dermatologists have even disputed its existence in the negro.
REPORT OF A CASE
R. B., aged 42, an American negro (full-blooded), was admitted to the syphilis clinic of Bellevue Hospital, Feb. 11, 1924. He gave a history of chancre twenty-three years previously, the scar of which was still present on the glans penis. Whether he had had secondaries or any treatment for same was not noted. It may be stated that he had no external evidence of syphilis.Examination revealed a generalized squamous eruption, most marked on the extensor aspects of the body and involving the scalp and face. This