title: Collision tumor in the ileum: a rare combination of an adenocarcinoma and small cell neuroendocrine tumor.
abstract: We present a case of a rare small bowel tumor. A 73-year-old female patient presented at our department with vague abdominal pain. Ultrasound examination discovered an inhomogeneous vascularised mass originating from a small bowel loop, mesenteric enlarged lymph nodes and a nodule in the liver. Multislice Computed Tomography of the abdomen confirmed the ultrasonographic findings and found omental implants together with a left-sided ovarian mass. Surgery was performed. Pathology revealed a rare ileal collision tumor consisting of an adenocarcinoma and a small cell neuroendocrine tumor with peritoneal metastasis of neuroendocrine origin and coincidental benign lesions on both ovaries.
authors.affiliation: Dpt of Radiology, AZ St.-Jan AV, Bruges, Belgium.
authors.forename: F
authors.initials: F
authors.lastname: Van Kerkhóve
authors.forename: K
authors.initials: K
authors.lastname: Coenegrachts
authors.forename: L
authors.initials: L
authors.lastname: Steyaert
authors.forename: I
authors.initials: I
authors.lastname: Van Den Berghe
authors.forename: J W
authors.initials: JW
authors.lastname: Casselman
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D000232:Adenofibroma / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D018253:Adenoma, Villous / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D018256:Adenomatous Polyps / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D000368:Aged; D018288:Carcinoma, Small Cell / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D003537:Cystadenoma / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D005260:Female; D005350:Fibroma / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D006801:Humans; D007078:Ileal Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D007082:Ileum / Q000473:pathology / Q000601:surgery; D007413:Intestinal Mucosa / Q000473:pathology / Q000601:surgery; D008099:Liver / Q000473:pathology / Q000601:surgery; D008207:Lymphatic Metastasis / Q000473:pathology; D008643:Mesentery / Q000473:pathology / Q000601:surgery; D009378:Neoplasms, Multiple Primary / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D009852:Omentum / Q000473:pathology / Q000601:surgery; D010051:Ovarian Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D010052:Ovariectomy; D010053:Ovary / Q000473:pathology; D010537:Peritoneum / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography