title: Extra-scalp black dot ringworm caused by Trichophyton tonsurans among contact sports players.
abstract: We describe here two patients with tinea corporis exhibiting black dot ringworm (BDR). A cluster of black dots was observed on the extensor surfaces of the extremities of two rather hairy male patients, a 15-year-old judo practitioner and a 26-year-old combined martial arts fighter, during treatment of tinea corporis with topical antimycotics. Direct KOH examination showed that the black dots were composed of degenerated hair with numerous arthroconidia and were indistinguishable from BDR of tinea capitis. Trichophyton tonsurans was isolated from the dots of both patients. Although they were diagnosed with tinea corporis, they required 2-3 months of treatment with oral terbinafine. Dermatologists should be aware that BDR can appear on areas of the skin other than the scalp.
authors.affiliation: Department of Dermatology, Kanazawa Medical University, Daigaku 1-1, Uchinada, Ishikawa, Japan. mocizuki@kanazawa-med.ac.jp
authors.forename: Takashi
authors.initials: T
authors.lastname: Mochizuki
authors.forename: Masako
authors.initials: M
authors.lastname: Kawasaki
authors.forename: Kazushi
authors.initials: K
authors.lastname: Anzawa
authors.forename: Kiyoto
authors.initials: K
authors.lastname: Kojima
authors.forename: Junko
authors.initials: J
authors.lastname: Hatta
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Tababe
authors.forename: Shuichi
authors.initials: S
authors.lastname: Higaki
authors.forename: Shigeru
authors.initials: S
authors.lastname: Fujita
mesh_terms: D000293:Adolescent; D000328:Adult; D000935:Antifungal Agents / Q000627:therapeutic use; D006801:Humans; D008297:Male; D016139:Martial Arts; D014006:Tinea Capitis / Q000188:drug therapy / Q000382:microbiology; D014249:Trichophyton / Q000302:isolation & purification*
chemical_list: D000935:Antifungal Agents
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