Use of dermoscopy for diagnosis of exogenous ochronosis

An Bras Dermatol. 2011 Jul-Aug;86(4 Suppl 1):S31-4. doi: 10.1590/s0365-05962011000700007.
[Article in English, Portuguese]

Abstract

Exogenous ochronosis consists of chronic hyperpigmentation of areas previously treated with topical agents such as hydroquinone, resorcinol, antimalarials and phenol. Early diagnosis allows to promptly suspend the causative agent and it is imperative since the available therapeutic options are scarce and have presented so far unsatisfactory results. Three cases of exogenous ochronosis on the face which were diagnosed with the use of dermoscopy are presented. Dermatoscopy showed blackish-gray amorphous structures, some obliterating the follicular openings. Histopathological examination confirmed the diagnosis.

MeSH terms

  • Adult
  • Dermatologic Agents / adverse effects*
  • Dermoscopy*
  • Facial Dermatoses / chemically induced*
  • Facial Dermatoses / diagnosis
  • Female
  • Humans
  • Hydroquinones / adverse effects*
  • Hyperpigmentation / diagnosis
  • Middle Aged
  • Ochronosis / chemically induced*
  • Ochronosis / diagnosis

Substances

  • Dermatologic Agents
  • Hydroquinones