title: Fluorine-18-fluorodeoxyglucose dual-head gamma camera coincidence imaging of recurrent colorectal carcinoma.
abstract: We report our experience with coincidence detection imaging of 18F-fluorodeoxyglucose (FDG) using a dual-head gamma camera. Scanning of the pelvis and abdomen of a patient with recurrent colorectal carcinoma showed recurrent disease in the pelvic floor and the base of the urinary bladder and metastatic disease in the retroperitoneal space of the pelvis. Although the tumor involving the bladder and pelvic floor was detected by CT and magnetic resonance imaging (MRI), metastatic spread to the retroperitoneal nodes on the left side was detected only by 18F-FDG imaging. Based on the ultrasound, CT, MRI and cystoscopy, a local recurrence of cancer was presumed in our patient. An exploratory laparotomy was performed to resect the tumor in its entirety. At the time of surgery, the retroperitoneal metastasis in the pelvis was confirmed. Had the findings of the coincidence detection imaging study been considered, the patient would have been spared the surgical procedure.
authors.affiliation: Department of Radiology, St. Vincent's Hospital and Medical Center of New York, and New York Medical College, Valhalla 10011, USA.
authors.forename: H M
authors.initials: HM
authors.lastname: Abdel-Dayem
authors.forename: A I
authors.initials: AI
authors.lastname: Radin
authors.forename: J Q
authors.initials: JQ
authors.lastname: Luo
authors.forename: H Y
authors.initials: HY
authors.lastname: Marans
authors.forename: S
authors.initials: S
authors.lastname: Wong
authors.forename: S Y
authors.initials: SY
authors.lastname: Naddaf
authors.forename: H M
authors.initials: HM
authors.lastname: El-Zeftawy
authors.forename: W S
authors.initials: WS
authors.lastname: Omar
authors.forename: K
authors.initials: K
authors.lastname: Mithilesh
authors.forename: H
authors.initials: H
authors.lastname: Abujudeh
authors.forename: S
authors.initials: S
authors.lastname: Atay
mesh_terms: D000230:Adenocarcinoma / Q000000981:diagnostic imaging*; D000368:Aged; D015179:Colorectal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D019788:Fluorodeoxyglucose F18; D015902:Gamma Cameras; D006801:Humans; D008207:Lymphatic Metastasis / Q000000981:diagnostic imaging; D008297:Male; D009361:Neoplasm Invasiveness; D009364:Neoplasm Recurrence, Local / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging; D019275:Radiopharmaceuticals; D001749:Urinary Bladder Neoplasms / Q000000981:diagnostic imaging
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18