title: [Prostatic stromal sarcoma in a 20-year-old patient].
abstract: OBJECTIVE
  Prostatic tumors are the most frequent malignant neoplasms in men, most of them being constituted by carcinomas; only 0.2% of malignant prostatic neoplasms are of mesenchimal origin. They are not well known, especially those of prostatic stromal phenotype.
  
  
  RESULTS
  We report the case of a 20 year-old man with a prostatic stromal sarcoma. After total cystoprostatectomy a tumor measuring 8 cm could be seen, replacing almost the whole prostate. Microscopically a spindle cell neoplasia with moderate atypia and a high mitotic index entrapping few elongated prostatic ducts (adopting a phyllodes tumor morphology) was observed.
  
  
  CONCLUSIONS
  The clinical behavior of these infrequent sarcomas is not well-established. Recurrences are not uncommon whereas lung and bone metastases have been described. Twelve months after surgery our patient is alive without evidence of disease.
authors.affiliation: Servicio de Anatomía Patológica, Hospital Juan Ramón Jiménez, Huelva, España. clarab@andaluciajunta.es
authors.forename: Concepción
authors.initials: C
authors.lastname: Lara
authors.forename: Juan José
authors.initials: JJ
authors.lastname: Borrero
authors.forename: Virginia
authors.initials: V
authors.lastname: Porras
authors.forename: J
authors.initials: J
authors.lastname: Giraldez
mesh_terms: D000328:Adult; D006801:Humans; D008297:Male; D011471:Prostatic Neoplasms / Q000175:diagnosis*; D012509:Sarcoma / Q000175:diagnosis*