Last reviewed: November 2017
Last updated: November  2017

Summary

Definition

History and exam

Key diagnostic factors

  • lesions appear "stuck-on"
  • localization on torso or face
  • yellow or light- to dark-brown-colored lesions
  • slightly raised, flat surface lesions
  • wart-like texture
  • multiple lesions
  • painless
  • itching (prurigo)

Other diagnostic factors

  • round yellow-white horn pearls in the surface of lesions

Risk factors

  • age over 50 years
  • white people
  • black people (dermatosis papulosa nigra)
  • female (dermatosis papulosa nigra)
  • family history
  • sun/UV exposure
  • pregnancy

Diagnostic investigations

Investigations to consider

  • dermoscopy
  • biopsy and histopathologic examination
  • reflectance confocal microscopy (RCM)
Full details

Treatment algorithm

Contributors

Authors VIEW ALL

Professor

Department of Dermatology

University Hospital Zurich

Zurich

Switzerland

Disclosures

RB declares that he has no competing interests.

Dr Ralph Braun would like to gratefully acknowledge Dr Isabel Kolm, the previous contributor to this monograph IK declares she has no competing interests

Peer reviewers VIEW ALL

Associate Professor

Department of Dermatology

University of Minnesota

MN

Disclosures

EW declares that he has no competing interests.

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