title: Ovarian undifferentiated carcinoma with voluminous mesenteric presentation.
abstract: BACKGROUND
  About 5% of ovarian cancers are so poorly differentiated and difficult to classify that they are called undifferentiated carcinomas and usually have disseminated disease at presentation. Extra pelvic debulking it is difficult to complete.
  
  
  METHODS
  We report a case of a rare ovarian tumor presented as a large mesenteric tumor of 14cm diameter in a 73 years old woman.
  
  
  CONCLUSIONS
  Undifferentiated carcinomas are usually large, solid with hemorrhage and necrosis, bilateral and most are difficult to classify histologically. Rarely are pure, generally identified through the extensive sampling of lesions, some other components of surface epithelial carcinoma and usually the predominant element is the latter. Cases with predominantly undifferentiated component are rare.
  
  
  CONCLUSIONS
  The treatment and diagnostic approach is the same as for other high-grade epithelial tumors of the ovary, but in this particular case the differential diagnosis and diagnostic approach is that of a mesenteric tumor.
authors.affiliation: Surgical Oncology, Instituto Nacional de Cancerología de México, DF, Mexico.
authors.forename: Rosa Angélica
authors.initials: RA
authors.lastname: Salcedo-Hernández
authors.forename: Leonardo Saúl
authors.initials: LS
authors.lastname: Lino-Silva
authors.forename: David
authors.initials: D
authors.lastname: Cantú de León
authors.forename: María Delia
authors.initials: MD
authors.lastname: Pérez-Montiel
authors.forename: Kuauhyama
authors.initials: K
authors.lastname: Luna-Ortiz