title: Epiluminescence microscopy for port-wine stains: pretreatment evaluation.
abstract: BACKGROUND
  Port-wine stains (PWSs) are characterized by an increased number of ectatic vessels. The treatment of choice is the use of some lasers such as pulsed dye lasers. However, some lesions are nonresponsive to laser treatment. Perhaps the vessels' depth and diameter and the thickness of the vessel wall are important factors influencing the effectiveness of the laser treatment.
  
  
  METHODS
  To investigate whether epiluminescence microscopy (ELM) could be useful in determining the effectiveness of laser treatment of PWSs, we studied a group of patients with PWSs using both ELM and histological analysis.
  
  
  RESULTS
  A correlation existed between a gray-whitish veil seen by ELM and the vessel depth judged by histology: when the veil was absent, the vessels were always found to be located only in the upper third of the dermis.
  
  
  CONCLUSIONS
  We think that the gray-whitish veil is a distinctive dermoscopic feature that is able to differentiate between superficial vessels (absence of veil) and deeper vessels (presence of veil).
authors.affiliation: Clinica Dermatologica, University Federico II, Naples, Italy.
authors.forename: E M
authors.initials: EM
authors.lastname: Procaccini
authors.forename: G
authors.initials: G
authors.lastname: Argenziano
authors.forename: S
authors.initials: S
authors.lastname: Staibano
authors.forename: G
authors.initials: G
authors.lastname: Ferrara
authors.forename: G
authors.initials: G
authors.lastname: Monfrecola
mesh_terms: D000293:Adolescent; D000328:Adult; D003937:Diagnosis, Differential; D003952:Diagnostic Imaging / Q000592:standards; D006801:Humans; D008853:Microscopy / Q000379:methods*; D008875:Middle Aged; D019339:Port-Wine Stain / Q000473:pathology*