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To the Editor:—In their article, "Lichen Simplex Chronicus in Orientals" (A. M. A. Arch. Dermat. & Syph.66:612-617 [Nov.] 1952), Dr. Charles R. Rein and Dr. B. Leonard Snider very aptly stress the higher incidence of this dermatosis in oriental patients. This higher incidence is of considerable interest, because its explanation might throw some light on the question of the pathogenesis of circumscribed neurodermatitis.
Having practiced dermatology for more than nine years in Shanghai, I should like to add a few remarks to this very interesting and important question, based on my knowledge of the local conditions there. When I started my dermatological practice in China, in the National Medical College of Shanghai (head, Dr. F. Reiss), one of my first impressions was the relatively high incidence of this dermatosis, localized on the neck, in the native population. In the statistics of Yang, from the same hospital,