title: Dermoscopy of non-pigmented eccrine poromas: study of Mexican cases.
abstract: BACKGROUND
  Eccrine poroma is a benign neoplasm that can mimick a malignant neoplasm dermoscopically. The characteristic vascular pattern of this tumor has not been established.
  
  
  OBJECTIVE
  To evaluate dermoscopic features of non-pigmented eccrine poroma in Mexican patients.
  
  
  METHODS
  We retrospectively studied histologically proven cases of eccrine poroma from three Mexican hospitals analyzed by four dermoscopists.
  
  
  RESULTS
  Thirteen cases were studied. A polymorphous vascular pattern was found in most cases. Four presented with irregular linear and branched vessels with semi-elliptical, or semicircular endings ("chalice-form" and "cherry-blossoms" vessels). Structureless pink-white areas were the most common other dermoscopic finding.
  
  
  CONCLUSIONS
  "Chalice-form" and "cherry-blossom" vessels have not been reported in other benign or malignant neoplasms and can be a useful clue to the diagnosis of non-pigmented eccrine poroma. Due to the variability of dermoscopic patterns of eccrine poroma further studies are required to establish the specificity of our findings.
authors.affiliation: Hospital General de Zona 8, Gilberto Flores Izquierdo, Instituto Mexicano del Seguro Social, Mexico City, Mexico.
authors.forename: Ana Elena Domínguez
authors.initials: AE
authors.lastname: Espinosa
authors.forename: Blanca Carlos
authors.initials: BC
authors.lastname: Ortega
authors.forename: Ricardo Quiñones
authors.initials: RQ
authors.lastname: Venegas
authors.forename: Roger González
authors.initials: RG
authors.lastname: Ramírez
keywords: dermoscopy; eccrine poroma; polymorphous vascular pattern