While I was working temporarily in Trang, South Siam, my attention was called to a nodular condition of the scalp hair by a teacher, who told me that a year before only 1 girl in her class had known that she had the condition but that within a few months all 12 girls in the class had it. I examined these children and sent some of their hair to America, where Dr. Fred D. Weidman, of the University of Pennsylvania, confirmed the diagnosis of tinea nodosa.1 I was surprised later to find a high incidence of the condition among school children in Trang, with cases in every class in the four schools which I investigated. The disease had been well known in the district for at least thirty years. The name for it may be translated as "flowering of the hair." Since I believe that no similar condition has
KNEEDLER WH. TINEA NODOSA OF THE SCALP HAIR IN SCHOOL CHILDREN OF SOUTH SIAM. Arch Derm Syphilol. 1939;39(1):121–125. doi:10.1001/archderm.1939.01480190124011
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