title: Unexpected small bowel intussusception caused by lung cancer metastasis on 18F-fluorodeoxyglucose PET-CT.
abstract: Small bowel metastasis from primary lung cancer is rare. We report the case of an unexpected small bowel intussusception caused by primary non-small cell lung cancer, which was primarily detected by 18 fluorine ((18)F)-fluorodeoxyglucose (FDG) positron emission tomography (PET) and computed tomography (CT). A 74-year-old man underwent FDG PET-CT for the diagnostic workup of a lung mass in the left upper lobe. On FDG PET-CT images, intense FDG uptake was observed in the primary lung mass lesion and mediastinal paraesophageal area. Furthermore, unexpected intense FDG uptake was observed in the jejunum along with the findings of intussusception in the proximal jejunum on the CT images of the PET-CT, which suggested jejunojejunal intussusception caused by lung cancer metastasis. The patient underwent an immediate operation, and the histopathologic results of the resected bowel indicated metastatic lesion from adenocarcinoma of the lung.
authors.affiliation: Department of Nuclear Medicine, National Cancer Center Research Institute and Hospital, Gyeonggi-do, Korea. thoracic@ncc.re.kr
authors.forename: Jeong Won
authors.initials: JW
authors.lastname: Lee
authors.forename: Seok-Ki
authors.initials: SK
authors.lastname: Kim
authors.forename: Ji Won
authors.initials: JW
authors.lastname: Park
authors.forename: Hyun-Sung
authors.initials: HS
authors.lastname: Lee
mesh_terms: D000368:Aged; D002289:Carcinoma, Non-Small-Cell Lung / Q000175:diagnosis / Q000556:secondary* / Q000601:surgery; D003937:Diagnosis, Differential; D019788:Fluorodeoxyglucose F18; D005500:Follow-Up Studies; D006801:Humans; D007443:Intussusception / Q000175:diagnosis / Q000209:etiology* / Q000601:surgery; D007579:Jejunal Diseases / Q000175:diagnosis / Q000209:etiology / Q000601:surgery; D007580:Jejunal Neoplasms / Q000150:complications* / Q000175:diagnosis / Q000556:secondary; D007813:Laparotomy; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D008297:Male; D009367:Neoplasm Staging; D049268:Positron-Emission Tomography / Q000379:methods*; D019275:Radiopharmaceuticals; D014057:Tomography, X-Ray Computed
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18