title: [Adenocarcinoid neoplasm of the colon. Case report].
abstract: BACKGROUND
  adenocarcinoid tumor is a rare malignancy that combines clinical and histological features of epithelial origin (adenocarcinoma) and neuroendocrine (carcinoid), occupies less than 1 % of all colorectal cancer histology, occurring mainly in the appendix and its presence in the colon is rare.
  
  
  METHODS
  we present a case of a 41-year-old female with sigmoid colon tumor, who underwent an extended left hemicolectomy and anastomosis; having a good postoperative evolution, with hospital stay of seventh days. The final histopathological study reported was adenocarcinoid colon tumor with free margins of injuries and four positive nodes of adenocarcinoma.
  
  
  CONCLUSIONS
  adenocarcinoid tumors are present in the appendix in 85 to 95 % of all cases and only 6 % are located in the colon (13 % in sigmoid). Early diagnosis is certainly the most important determinant of good prognosis, in these cases the five-year survival is 80 to 84 %, and 15 years of 60 %.
authors.affiliation: Servicio de Cirugía General, Hospital de Especialidades, Centro Médico Nacional La Raza, Instituto Mexicano del Seguro Social, Distrito Federal, México. jwelsh327@hotmail.com
authors.forename: Jorge
authors.initials: J
authors.lastname: Welsh-Rodríguez
authors.forename: Jesús
authors.initials: J
authors.lastname: Arenas-Osuna
authors.forename: Erick
authors.initials: E
authors.lastname: Servín-Torres
authors.forename: José Luis
authors.initials: JL
authors.lastname: Beristain-Hernández
authors.forename: Víctor
authors.initials: V
authors.lastname: Monroy-Hernández
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis / Q000601:surgery; D000328:Adult; D003110:Colonic Neoplasms / Q000175:diagnosis / Q000601:surgery; D005260:Female; D006801:Humans