18F-FDG PET／CT双时相显像在诊断膀胱癌术后复发和转移中的价值

摘要

Objective To investigate the clinical value of dual phase 18F-FDG PET/CT in the diagnosis of recurrent and metastatic bladder cancer after surgery. Methods The imaging data from 84 patients underwent the dual phase 18F-FDG PET/CT after surgery with known histories of bladder cancer were analyzed. Among the 84 patients, 16 had symptoms of recurrence, 24 had symptoms of metastasis and 44 didn′t have any symptom. The median interval time between the primary tumor resection and the PET/CT scan was 11.5 months (0.5 ~ 240 months). According to the PET/CT imaging procedures, all patients underwent whole body PET/CT scan at 60 minutes after IV injection of 18F-FDG. Additional delayed pelvic PET/CT images were acquired after forced diuresis by using oral 40 mg furosemide. The 18F-FDG PET/CT findings were compared with histopathologic examination results and (or) the clinical follow-up. All patients were followed up for more than six months. Results Results of detecting recurrence and metastasis of bladder cancer showed that the sensitivity, specificity, accuracy, positive predictive value and negative predictive value of the dual phase FDG PET/CT imaging protocol were 91.7%(22/24), 95.0%(57/60), 94.0%(79/84), 88.0%(22/25), 96.6%(57/59) and 90.0%(27/30), 96.3%(52/54), 94.0%(79/84), 93.1%(27/29), 94.5%(52/55), respectively. Conclusion Dual phase FDG PET/CT can be used to detect the recurrence and metastasis with high accuracy, contributing to the restaging and follow-up in bladder cancer after surgery.%目的：探讨18F-FDG PET/CT双时相显像诊断膀胱癌术后复发和转移灶的应用价值。方法：膀胱癌术后患者84例，其中临床可疑膀胱癌复发者16例，可疑转移者24例，无临床症状者44例。18F-FDG PET/CT检查时间为术后0．5～240个月，中位时间11．5个月。所有患者18F-FDG PET/CT常规全身显像后，口服40 mg呋塞米并多饮水，多次排尿，服呋塞米后约2 h憋尿充盈膀胱，再进行18F-FDG PET/CT盆腔延迟显像。膀胱癌复发病灶和转移灶的确诊，依据病理组织学检查结果或6个月以上的病例随访结果。结果：18F-FDG PET/CT显像诊断膀胱癌复发病灶的灵敏度、特异性、准确度、阳性预测值、阴性预测值分别为91．7％（22/24）、95．0％（57/60）、94．0％（79/84）、88．0％（22/25）、96．6％（57/59）；诊断膀胱癌转移病灶的灵敏度、特异性、准确度、阳性预测值、阴性预测值分别为90．0％（27/30）、96．3％（52/54）、94．0％（79/84）、93．1％（27/29）、94．5％（52/55）。结论：18F-FDG PET/CT双时相显像可以灵敏地检出膀胱癌术后的复发和转移灶，对膀胱癌术后随访及再分期具有重要的临床应用价值。