title: Neuroendocrine carcinomas of the colon and rectum: a clinicopathologic evaluation.
abstract: Neuroendocrine carcinomas were diagnosed in 13 of 683 patients who had colon cancers removed from January 1980 to June 1987 for an incidence of 1.9%. The patients were 28 to 89 years of age (median, 72 years). There were seven male and six female patients. The treatment was as follows: right hemicolectomy, 5; transverse colectomy, 1; left hemicolectomy, 1; low anterior resection, 2; abdominal-perineal resection, 1; and in 3 patients with rectal tumors, biopsy examination only was performed. Microscopic stages were as follows: Dukes' stage B, 1; stage C, 6; stage D, 5; and stage indeterminate, 1. By light microscopy, the tumors showed solid clusters or ribbons of round to fusiform, small to intermediate-sized cells with variably abundant mitoses. Eight tumors had foci of glandular and/or squamous differentiation. By immunohistochemistry, all tumors showed one or more neuroendocrine markers, including neuron-specific enolase, chromogranin, synaptophysin, serotonin, and various neuropeptides. By electron microscopy, single membrane-bound neurosecretory granules were noted. The sites of metastases included regional nodes, 8; liver, 5; bone, 1. Four patients were treated with a combination of chemotherapy and radiation therapy. These tumors were, as a group, aggressive, with eight patients dead within 12 months of diagnosis. Median survival was 7 months, with three patients alive at 2, 38, and 68 months, respectively. Specifically, small- and intermediate-cell neuroendocrine carcinomas of the colon and rectum behaved very aggressively and displayed numerous structural and functional similarities with their bronchopulmonary counterparts.
authors.affiliation: Department of General Surgery, Rush-Presbyterian-St. Luke's Medical Center, Chicago, Ill. 60612.
authors.forename: E D
authors.initials: ED
authors.lastname: Staren
authors.forename: V E
authors.initials: VE
authors.lastname: Gould
authors.forename: W H
authors.initials: WH
authors.lastname: Warren
authors.forename: N L
authors.initials: NL
authors.lastname: Wool
authors.forename: S
authors.initials: S
authors.lastname: Bines
authors.forename: J
authors.initials: J
authors.lastname: Baker
authors.forename: P
authors.initials: P
authors.lastname: Bonomi
authors.forename: D L
authors.initials: DL
authors.lastname: Roseman
authors.forename: S G
authors.initials: SG
authors.lastname: Economou
mesh_terms: D000328:Adult; D000368:Aged; D002277:Carcinoma / Q000032:analysis / Q000473:pathology*; D003110:Colonic Neoplasms / Q000032:analysis / Q000473:pathology*; D004700:Endocrine System Diseases / Q000378:metabolism / Q000473:pathology*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D009367:Neoplasm Staging; D009423:Nervous System Neoplasms / Q000378:metabolism / Q000473:pathology*; D012004:Rectal Neoplasms / Q000032:analysis / Q000473:pathology*