title: Ovarian cancer recurrence: role of whole-body positron emission tomography using 2-[fluorine-18]-fluoro-2-deoxy- D-glucose.
abstract: This study was designed to assess the value of whole-body positron emission tomography (PET) using 2-[fluorine-18]-fluoro-2-deoxy- D-glucose (FDG) for the diagnosis of recurrent ovarian cancer. Twenty-five patients who had previously undergone surgery for ovarian cancer were imaged using whole-body FDG-PET. During the 4 weeks preceding the PET study, conventional imaging, comprising computed tomography (CT) and magnetic resonance (MR) imaging of the abdomen and/or pelvis, was performed and serum CA125 levels were measured. PET imaging was commenced at 60 min after the intravenous administration of FDG in all patients. PET results were compared with the results of conventional imaging and CA125 levels, and related to pathological findings and clinical follow-up for more than 6 months. FDG-PET showed a sensitivity of 80% (16/20), a specificity of 100% (5/5) and an accuracy of 84% accuracy (21/25) for the diagnosis of recurrent ovarian cancer. The sensitivity, specificity and accuracy of conventional imaging were 55% (11/20), 100% (5/5) and 64% (16/25), respectively. PET could detect recurrent lesions in seven of nine patients in whom conventional imaging was falsely normal, while conventional imaging was true positive in two of four patients with false-negative PET results. The CA125 results showed a sensitivity of 75% (15/20), a specificity of 100% (5/5) and an accuracy of 80% accuracy (20/25). Among the 15 patients with true-positive CA125 results, PET correctly detected abnormal foci of recurrence in 13 patients (86.7%) whereas conventional imaging showed recurrent lesions in only eight patients (53.3%). In conclusion, our preliminary study demonstrates that FDG-PET may be accurate and useful for the detection of tumour recurrence when conventional imaging is inconclusive or negative, especially in patients with abnormal CA125 levels.
authors.affiliation: Positron Medical Center, Hamamatsu Medical Center, 5000, Hirakuchi, Hamakita, Shizuoka, 434-0041, Japan. tatsuo@pmc.hmedc.or.jp
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Torizuka
authors.forename: Shuji
authors.initials: S
authors.lastname: Nobezawa
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Kanno
authors.forename: Masami
authors.initials: M
authors.lastname: Futatsubashi
authors.forename: Etsuji
authors.initials: E
authors.lastname: Yoshikawa
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Okada
authors.forename: Munetaka
authors.initials: M
authors.lastname: Takekuma
authors.forename: Makoto
authors.initials: M
authors.lastname: Maeda
authors.forename: Yasuomi
authors.initials: Y
authors.lastname: Ouchi
mesh_terms: D000230:Adenocarcinoma / Q000097:blood / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000628:therapy; D018262:Adenocarcinoma, Clear Cell / Q000097:blood / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000628:therapy; D002288:Adenocarcinoma, Mucinous / Q000097:blood / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000628:therapy; D000328:Adult; D000368:Aged; D018394:CA-125 Antigen / Q000097:blood; D005188:False Negative Reactions; D005189:False Positive Reactions; D005260:Female; D019788:Fluorodeoxyglucose F18; D005500:Follow-Up Studies; D006106:Granulosa Cell Tumor / Q000097:blood / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000628:therapy; D006801:Humans; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000097:blood / Q000175:diagnosis / Q000000981:diagnostic imaging*; D009367:Neoplasm Staging; D010051:Ovarian Neoplasms / Q000097:blood / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000628:therapy; D011182:Postoperative Care; D019275:Radiopharmaceuticals; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014055:Tomography, Emission-Computed / Q000379:methods*; D014915:Whole-Body Counting
chemical_list: D018394:CA-125 Antigen; D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18