The term sycosis vulgaris, as a perusal of the recent textbooks on dermatology indicates, is now used exclusively for a kind of primary coccogenous purulent folliculitis of the regions of the beard and mustache. Stellwagon and Gaskill1 stated: "As the disease [sycosis vulgaris] is now known to be microbic in origin, the term `non-parastic,' formerly used to distinguish it from parasitic [that is, tineal] sycosis . . . is no longer applicable." Thus both tineal sycosis and coccogenous sycosis are primary parasitic infections of the hair follicles. There appears, however, to be a form of folliculitis barbae which is truly nonparasitic primarily, although it may become so secondarily, and which deserves description apart from the true parasitic types of folliculitis of the beard. There is some similarity between this form and that classified as a form of sycosis vulgaris by Walker.2 He described a rare form of sycosis occurring
GREENBAUM SS. FOLLICULITIS BARBAE TRAUMATICA. Arch Derm Syphilol. 1935;32(2):237–241. doi:10.1001/archderm.1935.01470020059006
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