title: [Basal cell carcinomas in radiotherapy-treated port wine stains. An ideal indication for Mohs surgery].
abstract: BACKGROUND
  Early treatment of port wine stains with ionizing radiation can lead to the development of often multifocal basal cell carcinomas (BCC) after decades. In most cases it is clinically impossible to distinguish between the tumor and the underlying vascular malformation and to decide where to set surgical margins.
  
  
  METHODS
  We report on a series of three patients with BCC overlying a port wine stain that had previously been treated with radiation therapy in early childhood. In all patients Mohs surgery was performed to insure complete excision of the BCC.
  
  
  RESULTS
  In our patients, development of BCC occurred about 20 to 40 years after radiation therapy. Clinically - without the help of Mohs surgery - the borders of the BCC could not have been detected due to the underlying nevi flammei in all cases.
  
  
  CONCLUSIONS
  BCC overlying a port wine stain previously treated with radiation therapy is a rare but ideal indication for Mohs surgery. In addition we recommend regular clinical follow-ups to detect recurrent or additional BCC as early as possible.
authors.affiliation: Klinik und Poliklinik für Dermatologie und Venerologie, Ludwig-Maximilans-Universität, Frauenlobstr. 9-11, 80337, München, Deutschland. elke.sattler@med.uni-muenchen.de
authors.forename: E
authors.initials: E
authors.lastname: Sattler
authors.forename: H-C
authors.initials: HC
authors.lastname: Räwer
authors.forename: M
authors.initials: M
authors.lastname: Mühlstädt
authors.forename: T
authors.initials: T
authors.lastname: Ruzicka
authors.forename: W
authors.initials: W
authors.lastname: Burgdorf
authors.forename: C
authors.initials: C
authors.lastname: Kunte
mesh_terms: D000328:Adult; D000369:Aged, 80 and over; D002280:Basal Cell Carcinoma / Q000473:pathology / Q000601:surgery*; D002675:Child, Preschool; D005153:Facial Neoplasms / Q000473:pathology / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D015580:Mohs Surgery; D009378:Neoplasms, Multiple Primary / Q000473:pathology / Q000601:surgery; D009381:Neoplasms, Radiation-Induced / Q000473:pathology / Q000601:surgery*; D019339:Port-Wine Stain / Q000532:radiotherapy*; D012867:Skin / Q000473:pathology / Q000528:radiation effects; D012878:Skin Neoplasms / Q000473:pathology / Q000601:surgery*