title: [An exceptional mimicker of ovarian tumors: cancer in a pelvic horseshoe kidney].
abstract: BACKGROUND
  although the horseshoe kidney is a frequent congenital abnormality, the likelihood of it being the cause of a malignant tumor that looks like an ovarian neoplasm has not been reported.
  
  
  METHODS
  a 53-year-old female came to the hospital with a pelvic tumor. The patient had a history of a simple hysterectomy due to uterine myomatosis. At abdominal physical examination we identified a rounded hypogastric tumor, 20 cm diameter, firm, and fixed. On pelvic examination the mass was easily palpated through the vaginal fornix. The diagnosis of a probable ovarian neoplasm, caused by a residual ovary syndrome was made, therefore she was admitted to the gynecology service. Computed tomography scans showed a tumor located in the right side of a deformed pelvic kidney. Hence, the gynecology service sent the patient to the surgical oncology department, where the assumption was confirmed. The analysis of the RX studies showed a possible neoplasm from a pelvic horseshoe kidney. The patient underwent an exploratory abdominal surgery, and a 19 cm tumor was excised. The pathology department reported a chromophobe cell carcinoma.
  
  
  CONCLUSIONS
  tumors in the pelvic horseshoe kidney may simulate an ovarian neoplasms in females.
authors.affiliation: Servicio de Oncología Quirúrgica, Hospital General Tacuba, Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado. Departamento de Cirugía, Facultad de Medicina, Universidad Nacional Autónoma de México, Distrito Federal, Mexico. cortizmendoza@yahoo.com.mx.
authors.forename: Carlos Manuel
authors.initials: CM
authors.lastname: Ortiz-Mendoza
mesh_terms: D000013:Congenital Abnormalities / Q000175:diagnosis; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007668:Kidney / Q000002:abnormalities*; D008875:Middle Aged; D010051:Ovarian Neoplasms / Q000175:diagnosis*; D010388:Pelvis
keywords: kidney; kidney neoplasms; neoplasias renales; riñón