title: Clonal seborrheic keratosis: dermoscopic and confocal microscopy characterization.
abstract: BACKGROUND
  The diagnosis of clonal seborrheic keratosis may be challenging clinically and histologically.
  
  
  OBJECTIVE
  In our study, we describe the common aspects of this benign entity that show peculiar dermoscopic and confocal findings.
  
  
  METHODS
  A total of nine clonal seborrheic keratosis were analyzed.
  
  
  RESULTS
  Upon dermoscopy, it reveals the presence of globular-like structures and sharply demarcated borders whereas confocal microscopy displays the typical intraepidermal nesting of pigmented keratinocytes that permits to have a reliable in vivo diagnosis.
  
  
  CONCLUSIONS
  Dermoscopy and confocal microscopy permit to in vivo diagnose this variant of seborrheic keratosis.
authors.affiliation: Skin Cancer Unit, First Medical Department, Arcispedale Santa Maria Nuova, IRCCS, Reggio Emilia, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Longo
authors.forename: I
authors.initials: I
authors.lastname: Zalaudek
authors.forename: E
authors.initials: E
authors.lastname: Moscarella
authors.forename: A
authors.initials: A
authors.lastname: Lallas
authors.forename: S
authors.initials: S
authors.lastname: Piana
authors.forename: G
authors.initials: G
authors.lastname: Pellacani
authors.forename: G
authors.initials: G
authors.lastname: Argenziano
mesh_terms: D046169:Dermoscopy / Q000379:methods*; D003937:Diagnosis, Differential; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D017492:Keratosis, Seborrheic / Q000175:diagnosis*; D008297:Male; D018613:Microscopy, Confocal / Q000379:methods*; D008875:Middle Aged; D015203:Reproducibility of Results; D012189:Retrospective Studies