title: [Nephrogenic adenoma. Report of 4 new cases].
abstract: OBJECTIVE
  Four additional cases of nephrogenic adenoma are described.
  
  
  METHODS
  The clinical records of patients with nephrogenic adenoma that had been diagnosed at our hospital from 1994 to 1999 were reviewed.
  
  
  RESULTS
  The most frequent localization was the urinary bladder and it was more prevalent in middle-aged men. This condition usually presented as a histological finding in the course of follow-up or treatment of other bladder conditions by TUR or cystectomy. Biopsy is fundamental for diagnosis.
  
  
  CONCLUSIONS
  Nephrogenic adenoma is a rare benign metaplastic lesion of the urinary tract that appears to result from chronic irritative stimulus to the urothelium. The treatment of choice is by transurethral resection. Although no case of progression to malignancy have been detected, long-term follow-up by endoscopy and ultrasound is advocated due to its predispositon to recurrence.
authors.affiliation: Servicio de Urología, Hospital Universitario Virgen del Rocío, Sevilla, España.
authors.forename: B
authors.initials: B
authors.lastname: Congregado Ruiz
authors.forename: R
authors.initials: R
authors.lastname: Medina López
authors.forename: R
authors.initials: R
authors.lastname: Ruiz Mateos
authors.forename: P
authors.initials: P
authors.lastname: Campoy Martínez
authors.forename: M
authors.initials: M
authors.lastname: Pérez Pérez
authors.forename: A
authors.initials: A
authors.lastname: Soltero González
mesh_terms: D000236:Adenoma / Q000473:pathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014571:Urologic Neoplasms / Q000473:pathology*