title: [Nail unit blue melanocyte nevi: 2 case reports].
abstract: BACKGROUND
  Nail unit blue nevus is a rare and benign melanocyte proliferation of the nail unit matrix.
  
  
  METHODS
  We report two cases of nail matrix blue nevi with a blue-black spot of the lunular area associated in the first case with a longitudinal nail groove.
  
  
  CONCLUSIONS
  The analysis of our cases and of the previously reported cases give us the opportunity to describe different clinical and histological presentations.
authors.affiliation: Policlinique de Dermatologie, Hôpital Saint-Louis, 1, avenue Claude Vellefaux, 75475 Paris 10. isamm@club-internet.fr
authors.forename: I
authors.initials: I
authors.lastname: Moulonguet-Michau
authors.forename: P
authors.initials: P
authors.lastname: Abimelec
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D009260:Nail Diseases / Q000473:pathology* / Q000601:surgery; D009508:Nevus, Pigmented / Q000473:pathology* / Q000601:surgery