title: [Malignant stromal tumor of the transverse colon. Case report].
abstract: OBJECTIVE
  Case report of a malignant stromal tumor of the transverse colon.
  
  
  BACKGROUND
  Colon sarcomas are rare; the most frequent presentation is the leiomyosarcoma. Forty five cases of malignant stromal tumor have been reported in the international literature. The histogenesis of these mesenchymatous neoplasms is determined by ultrastructural analysis and immunohistochemical stains, nevertheless when special techniques are negative and there is uncertainty related to the cellular differentiation line (smooth muscle, neural or undifferentiated) it is preferable to call them stromal tumors of gastrointestinal tract.
  
  
  METHODS
  A 46 year old patient with the diagnosis of malignant stromal tumor of transverse colon and the prescribed treatment was reported.
  
  
  RESULTS
  A case of a patient with the diagnosis of malignant stromal tumor in transverse colon is presented, who had as the main clinical features abdominal pain, transanal hemorrhage and finally intestinal occlusion. He was submitted to exploratory laparotomy finding a transverse colon intussusception, which was treated with an extended right hemicolectomy and a post surgical satisfactory recovery. Follow-up to three years hasn't found tumoral activity.
  
  
  CONCLUSIONS
  Stromal tumors are rare in colon, treatment is a wide surgical resection with curative or palliative purposes.
authors.affiliation: Departamento de Cirugía de Colon y Recto, Hospital de Especialidades, Centro Médico Nacional Siglo XXI. IMSS, México, D.F., México.
authors.forename: E
authors.initials: E
authors.lastname: Villanueva Sáenz
authors.forename: J
authors.initials: J
authors.lastname: Montes Vega
authors.forename: J P
authors.initials: JP
authors.lastname: Peña Ruiz Esparza
authors.forename: A
authors.initials: A
authors.lastname: Unzueta Hébert
authors.forename: J L
authors.initials: JL
authors.lastname: Rocha Ramírez
authors.forename: L M
authors.initials: LM
authors.lastname: Gómez Jiménez
authors.forename: F J
authors.initials: FJ
authors.lastname: Barrientos Castro
mesh_terms: D003110:Colonic Neoplasms / Q000473:pathology* / Q000601:surgery / Q000648:ultrastructure; D006801:Humans; D007813:Laparotomy; D007890:Leiomyosarcoma / Q000473:pathology* / Q000601:surgery / Q000648:ultrastructure; D008297:Male; D008875:Middle Aged