The first recorded observation found in the literature of this interesting and apparently rare disorder is that of Galewsky.1 The case occurred in a man whose age is not given and whose case was demonstrated before a meeting of the Deutscher Naturforscher und Ärzte of Dresden, in 1907. The patient consulted Galewsky for a pustular folliculitis and was entirely unaware of the presence of an area of alopecia on the otherwise unusually hairy abdomen. In this area, which is described as being two and one-half times the size of an orange, the follicles contained blackish, elevated, horny, spinous plugs which filled the dilated orifices, and which could be easily removed. When examined microscopically, the keratotic masses were found to contain bundles of lanugo hairs which protruded beyond the keratotic plugs. There was no subjective sensation, and the patient did not return for further observation. It was not until 1911
MITCHELL JH. TRICHOSTASIS SPINULOSA OR PINSELHAAR. Arch Derm Syphilol. 1925;11(1):80–90. doi:10.1001/archderm.1925.02370010093005
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