title: FDG uptake in PET by bladder hernia simulating inguinal metastasis.
abstract: A 70-year-old man with past history of hemicolectomy due to colon cancer underwent a follow-up abdominal/pelvic CT scan. CT revealed a right adrenal metastasis and then he underwent FDG-PET/CT study to search for other possible tumor recurrence. In PET images, other than right adrenal gland, there was an unexpected intense FDG uptake at right inguinal region and at first, it was considered to be an inguinal metastasis. However, correlation of PET images to concurrent CT data revealed it to be a bladder herniation. This case provides an example that analysis of PET images without corresponding CT images can lead to an insufficient interpretation or false positive diagnosis. Hence, radiologists should be aware of the importance of a combined analysis of PET and CT data in the interpretation of integrated PET/CT and rare but intriguing conditions, such as bladder herniation, during the evaluation of PET scans in colon cancer patients.
authors.affiliation: Department of Diagnostic Radiology, Yonsei University College of Medicine, 250 Seongsanno, Seodaemun-gu, Seoul, Korea.
authors.forename: Sung Hee
authors.initials: SH
authors.lastname: Park
authors.forename: Myeong-Jin
authors.initials: MJ
authors.lastname: Kim
authors.forename: Joo Hee
authors.initials: JH
authors.lastname: Kim
authors.forename: Arthur Eung-Hyuck
authors.initials: AE
authors.lastname: Cho
authors.forename: Mi-Suk
authors.initials: MS
authors.lastname: Park
authors.forename: Ki Whang
authors.initials: KW
authors.lastname: Kim
mesh_terms: D000008:Abdominal Neoplasms / Q000000981:diagnostic imaging / Q000556:secondary; D000368:Aged; D003110:Colonic Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology; D003937:Diagnosis, Differential; D005189:False Positive Reactions; D019788:Fluorodeoxyglucose F18; D006552:Hernia, Inguinal / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D049268:Positron-Emission Tomography; D019275:Radiopharmaceuticals; D014057:Tomography, X-Ray Computed; D001745:Urinary Bladder Diseases / Q000000981:diagnostic imaging*
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18