title: Retrolumbar subcutaneous ependymoma and giant bathing-trunk nevocellular nevus.
abstract: BACKGROUND
  Subcutaneous ependymomas have been reported rarely in dermatologic reviews and, apparently, were never associated with other cutaneous malformations.
  
  
  METHODS
  A 60-year-old woman with a retrolumbar subcutaneous ependymoma and a giant bathing-trunk nevocellular nevus submitted to thorough dermatologic and neurologic investigation. The surgical material was extensively analyzed with light and electron microscope. The literature was reviewed.
  
  
  RESULTS
  The tumor fits exactly the classical prerequisites of the clinical and pathologic diagnosis. In contrast with the literature, it developed at 53 years, apparently after a trauma, within a congenital giant nevocellular nevus, at the retrolumbar level; it proved unrelated to any spinal cord alteration and so far appeared quite benign.
  
  
  CONCLUSIONS
  The observation of a retrolumbar subcutaneous ependymoma is reported with detail; this tumor exceptionally recognized by dermatologists must be included in the differential diagnosis of lumps arising in the retrolumbar-retrosacral area. The most peculiar feature was its development within a giant bathing-trunk nevocellular nevus; such a fascinating association of two neurectodermal defects, as far as known, is presented for the first time.
authors.affiliation: Department of Dermatology, Faculty of Medicine, Catholic University of Louvain, Brussels, Belgium.
authors.forename: J
authors.initials: J
authors.lastname: Bourlond
authors.forename: A
authors.initials: A
authors.lastname: Bourlond
authors.forename: C
authors.initials: C
authors.lastname: Rousseau
mesh_terms: D004806:Ependymoma / Q000209:etiology / Q000473:pathology*; D005260:Female; D006801:Humans; D008161:Lumbosacral Region; D008854:Microscopy, Electron; D008875:Middle Aged; D009508:Nevus, Pigmented / Q000151:congenital / Q000473:pathology* / Q000503:physiopathology; D012878:Skin Neoplasms / Q000151:congenital / Q000473:pathology* / Q000503:physiopathology