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Article
September 1971

PSORIASIS IN JAPAN

Author Affiliations

Health Department Osaka Prefectural Government Higashi-ku, Osaka, Japan

Department of Dermatology Osaka University Hospital Fukushima-ku, Osaka, Japan

Arch Dermatol. 1971;104(3):328-329. doi:10.1001/archderm.1971.04000210102023
Abstract

To the Editor.—  Psoriasis is said to be a common disease in the white1(p1067) and in some groups of Negroes.2 This is based chiefly on the high incidence of this disease at skin clinics in Europe and America. It is also said that psoriasis is a hereditary disease because of frequent familial occurrence.1 (p1070) Both are not cases, however, in Japan.Previously, we found only three cases of familial occurrence in 43 Japanese psoriatics,3 that is, much lower than reported in whites (36%).4 Moreover, clinical symptoms of psoriasis in Japanese persons seem to appear at older ages than in whites.The number of psoriatic patients seen at the Department of Dermatology of Osaka University Hospital from 1957 to 1970 and its incidence in outpatients are listed in Table 1. The rise in percentage of psoriasis seems to depend on social factors. If there is actual

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