Onychomycosis of the Middle Finger of a Japanese Judo Athlete due to <i>Trichophyton tonsurans</i>

Abstract

We present a 17-year-old Japanese male high school student, who had applied steroid ointment for atopic dermatitis, with fingernail onychomycosis due to Trichophyton tonsurans. He was found positive for T. tonsurans infection based on hairbrush culture performed due to an epidemic of T. tonsurans infection in his judo club. The hairbrush culture method is very important in screening for this infection, and dermatologists should examine the entire body of athletes who are found positive using this method. For the diagnosis of T. tonsurans infection, other than the skin and hair, the nails should also be checked by dermoscopy because the fingernail may be the origin of this fungus.

Pull-Up Palms (PUP): A Case of Exercise-Associated Palmar Callosities and Review of Sports-Related Hand-Associated Skin Conditions in Athletes

“…The dermatologic disorders that may develop in athletes can be a direct consequence of the actions involved by the participant or an indirect sequelae of infection or allergy. Similar to our patient with pull-up palms, the designation of specific sports-associated dermatosis has been created by linking the athletic activity and the affected location [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

“…The hands can be affected by several sports-associated dermatoses (Table 1) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. These include infections from bacteria, fungi, and viruses.…”

“…They include not only infections, but also dermatoses from trauma and contact allergies. Several sports have unique skin conditions that may be observed in participants [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

“…They include sports with balls, racquets, or both. In addition, they include athletic activities requiring firm gripping of mobile or stationary bars such as gymnastics and weight lifting [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

A Case of Tinea Pseudoimbricata Due to <i>Trichophyton tonsurans</i> Induced by Topical Steroid Application

“…Baah et al reported that T. tonsurans was the most common cause of tinea corporis and tinea pseudoimbricata in the United States 12) . In Japan, although the incidence of T. tonsurans infection among contact sports athletes using topical steroids is gradually increasing 14) , tinea corporis caused by Trichophyton rubrum or Microsporum canis was the most common based on epidemiological investigation 15) . Our case was typical in that eruption on the trunk was observed and there was a history of topical steroid application, but the isolation of T. tonsurans in culture is rare.…”