L.—PITYRIASIS ROSEA

Abstract
Having had the opportunity to study a large series of cases of pityriasis rosea from the services of Drs. Engman and Mook at the Barnard Free Skin and Cancer Hospital, the Washington University Dispensary, the Barnes Hospital and the St. Louis Children's Hospital, it occurred to us that a detailed study of this series of 380 cases might add to the knowledge of the subject. Speculation as to the exciting cause of the disease is not in order in a report of this character, and we shall therefore confine ourselves to a statement of the facts as we found them and to a report of instructive cases, some of which are included in this series and others from the private records of Drs. Engman and Mook. AGE In our series of 380 cases, ninety-one patients were between the ages of 10 and 19, inclusive, and 124 between the ages of 20 and 29, inclusive; i. e., 215 or 56.6 per cent were between the ages of 10 and 29, inclusive.

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