Exogenous ochronosis in a Chinese patient: use of dermoscopy aids early diagnosis and selection of biopsy site.
The diagnosis of exogenous ochronosis is often challenging and requires a high index of suspicion. Herein, we report a case of exogenous ochronosis in a Chinese patient. The condition was caused by the use of bleaching agents, including creams containing hydroquinone. We demonstrate the use of dermoscopy as an invaluable tool for the early recognition of the condition, as well as in the selection of an appropriate site for a skin biopsy.
National Skin Centre, 1 Mandalay Road, Singapore 308205. coniliu@nsc.gov.sg.
Wen Chun
WC
Liu
Hong Liang
HL
Tey
Joyce Siong See
JS
Lee
Boon Kee
BK
Goh
D000474:Alkaptonuria; D001706:Biopsy; D057886:Bleaching Agents / Q000009:adverse effects; D002681:China; D046169:Dermoscopy / Q000379:methods*; D006801:Humans; D006873:Hydroquinones / Q000009:adverse effects*; D008297:Male; D008548:Melanosis / Q000188:drug therapy*; D008875:Middle Aged; D009794:Ochronosis / Q000175:diagnosis* / Q000628:therapy; D012867:Skin / Q000187:drug effects / Q000473:pathology; D016896:Treatment Outcome
D057886:Bleaching Agents; D006873:Hydroquinones; C031927:hydroquinone