title: Dermoscopy of Nodular Hidradenoma, a Great Masquerader: A Morphological Study of 28 Cases.
abstract: BACKGROUND
  Nodular hidradenoma is an uncommon, benign, adnexal neoplasm of apocrine origin which is a clinical simulator of other tumours.
  
  
  OBJECTIVE
  The aim of this study was to evaluate the morphological findings of a large series of nodular hidradenomas under dermoscopic observation.
  
  
  METHODS
  Dermoscopic examination of 28 cases of nodular hidradenomas was performed to evaluate specific dermoscopic criteria and patterns.
  
  
  RESULTS
  The most frequently occurring dermoscopic features were: (1) in 96.4% of cases, a homogeneous area that covered the lesion partially or totally, the colour of which was pinkish in 46.4% of cases, bluish in 28.6%, red-blue in 14.3%, and brownish in 10.7%; (2) white structures were found in 89.3% of cases; (3) in 82.1% of cases, vascular structures were also observed, especially arborising telangiectasias (39.3%) and polymorphous atypical vessels (28.6%).
  
  
  CONCLUSIONS
  Nodular hidradenomas represent a dermoscopic pitfall, being difficult to differentiate clinically and dermoscopically from basal cell carcinomas and melanomas.
authors.affiliation: Dermatology Department, Hospital Sant Pau i Santa Tecla, Tarragona, Spain.
authors.forename: Patricia
authors.initials: P
authors.lastname: Serrano
authors.forename: Aimilios
authors.initials: A
authors.lastname: Lallas
authors.forename: Luis Javier
authors.initials: LJ
authors.lastname: Del Pozo
authors.forename: Isil
authors.initials: I
authors.lastname: Karaarslan
authors.forename: Carolina
authors.initials: C
authors.lastname: Medina
authors.forename: Luc
authors.initials: L
authors.lastname: Thomas
authors.forename: Christian
authors.initials: C
authors.lastname: Landi
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Argenziano
authors.forename: Pedro
authors.initials: P
authors.lastname: Zaballos
mesh_terms: D018250:Acrospiroma / Q000000981:diagnostic imaging* / Q000473:pathology; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D046169:Dermoscopy; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013544:Sweat Gland Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D055815:Young Adult