title: Primary retroperitoneal mucinous cystadenocarcinoma: report of two cases.
abstract: BACKGROUND
  Retroperitoneal cystadenocarcinomas are rare lesions, the majority of cases presented as one-patient reports.
  
  
  METHODS
  We present two cases of retroperitoneal cystadenocarcinoma, both in women of reproductive age: one with aggressive behavior, and the remaining case, with a more indolent clinical evolution.
  
  
  RESULTS
  One case presented as pelvic tumor, was treated with surgical resection of the disease, but manifested with recurrent disease a few months later despite use of chemotherapy. The second case involved a patient with diagnosis of abdominal tumor; during laparotomy, a retroperitoneal tumor was found and was totally removed. At follow-up, the patient is disease-free with no other treatment.
  
  
  CONCLUSIONS
  The behavior and treatment of retroperitoneal cystadenocarcinoma are controversial. We suggest aggressive surgery including radical hysterectomy and bilateral salpingoopherectomy with adjuvant chemotherapy in these cases.
authors.affiliation: Department of Gynecologic Oncology, Instituto Nacional de Cancerología de México (INCan), Mexico City, Mexico. dcantu3@excite.com
authors.forename: David Cantú
authors.initials: DC
authors.lastname: de León
authors.forename: Delia
authors.initials: D
authors.lastname: Pérez-Montiel
authors.forename: José
authors.initials: J
authors.lastname: Chanona-Vilchis
authors.forename: Alfonso
authors.initials: A
authors.lastname: Dueñas-González
authors.forename: Verónica
authors.initials: V
authors.lastname: Villavicencio-Valencia
authors.forename: Gladys
authors.initials: G
authors.lastname: Zavala-Casas
mesh_terms: D000328:Adult; D018282:Cystadenocarcinoma, Mucinous / Q000175:diagnosis / Q000473:pathology*; D005260:Female; D006801:Humans; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis / Q000473:pathology*; D055815:Young Adult