title: Pitfall in pigmentation: pseudopods in the nail plate.
abstract: BACKGROUND
  We present here a patient with an unusual type of nail plate pigmentation featuring pseudopod formation.
  
  
  OBJECTIVE
  To identify additional dermoscopic criteria.
  
  
  METHODS
  Dermoscopy of the nail with control biopsy.
  
  
  RESULTS
  Pseudopods of the nail resulted from erythrocytes entrapped between the layers of the nail plate.
  
  
  CONCLUSIONS
  Pseudopod formation of the nail may represent a diagnostic criterion to distinguish hemorrhage and melanoma of the nail apparatus.
authors.affiliation: Department of Dermatology, Medical Faculty (Charité), Humboldt-University Berlin, Berlin, Germany. norb.haas@charite.de
authors.forename: Norbert
authors.initials: N
authors.lastname: Haas
authors.forename: Beate-Maria
authors.initials: BM
authors.lastname: Henz
mesh_terms: D001706:Biopsy; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008875:Middle Aged; D009260:Nail Diseases / Q000175:diagnosis*; D009262:Nails / Q000098:blood supply*; D010859:Pigmentation Disorders / Q000175:diagnosis*