Since 1893, when Vidal1 observed and recorded the first case of "keratodermie blenorrhagique," only fifty-eight cases have been described. In making an entity of this disease, Vidal detailed a generalized and symmetrical eruption of cornified crusts with falling of the nails, associated with a urethritis and polyarthritis of gonorrheal origin. The patient was bedridden, markedly emaciated and had in addition a conjunctivitis and blepharitis. He was particularly interested, however, in the cutaneous manifestations and referred to them in detail. The eruption was composed of hard cornified dry crusts without traces of moisture. These were small and disseminated on the head, face and trunk. On the extremities, the crusts were larger and more abundant, and the hands and feet were particularly attacked. The palmar surfaces presented yellow brown crusts, some discrete and some confluent. The fingers were unequally involved, but the distal phalanges were covered with a thick cornified crust
KEIM HL. THE HISTOGENESIS OF KERATODERMA BLENNORRHAGICUM. Arch Derm Syphilol. 1924;9(4):423–440. doi:10.1001/archderm.1924.02360220003001
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