Last reviewed:October 2019
Last updated:December  2018

Summary

Definition

History and exam

Key diagnostic factors

  • lesions appear 'stuck-on'
  • localisation on torso or face
  • yellow or light- to dark-brown-coloured 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 histopathological examination
  • reflectance confocal microscopy (RCM)
Full details

Treatment algorithm

Contributors

Professor

Department of Dermatology

University Hospital Zurich

Zurich

Switzerland

Disclosures

RB declares that he has no competing interests.

Consultant Dermatologist

Department of Dermatology

University Hospital Zurich

Zurich

Switzerland

Disclosures

IKD declares that she has no competing interests.

Peer reviewersVIEW ALL

Associate Professor

Department of Dermatology

University of Minnesota

MN

Disclosures

EW declares that he has no competing interests.

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