【摘要】 目的探讨PET/CT诊断肾细胞癌（RCC）合并静脉瘤栓的价值。方法回顾性分析27例肾癌合并静脉瘤栓患者的PET/CT资料。将PET/CT瘤栓分级与临床分级进行对照,根据病理结果将患者分为瘤栓侵犯静脉壁组和未侵犯静脉壁组,分析2组原发肿瘤SUV_max、瘤栓SUV_max及下腔静脉最大径的差异。结果 PET/CT检出瘤栓27例,瘤栓检出率100%（27/27）,静脉瘤栓SUV_max平均6.98±5.50;PET/CT正确分级26例（26/27,96.30%）。8例合并下腔静脉血栓,PET/CT诊断准确率87.50%（7/8）,静脉血栓平均SUV_max为1.30±0.28。瘤栓SUV_max明显高于血栓（P<0.001）。2组肿瘤原发灶SUV_max、瘤栓SUV_max及下腔静脉最大径差异均无统计学意义（P均>0.05）。结论 PET/CT对RCC合并静脉瘤栓及血栓具有较高的检测准确率,瘤栓分级准确率较高,但评估瘤栓是否侵犯静脉壁的能力有限。更多还原

【Abstract】 Objective To explore the diagnosis value of ¹⁸F-FDG PET/CT for renal cell carcinoma（RCC） with venous tumor thrombosis（VTT）. Methods PET/CT data of 27 patients with pathologically confirmed RCC with VTT were analyzed retrospectively. PET/CT grading was compared with clinical grading for classification of VTT. According to pathological findings, the patients were divided into venous wall invasion group and venous wall noninvasion group. SUV_max of primary tumor, of VTT and inferior vena cava diameter were compared between two groups. Results The average SUV_max of VTT was 6.98±5.50 in 27 cases with 100%（27/27） detection rate for VTT. Correct classification of VTT was performed in 26 cases with PET/CT, the accuracy rate was 96.30%（26/27）. The average SUV_max of bland thrombosis（BT） was 1.30±0.28 in 8 cases, and the diagnostic accuracy was 87.50%（7/8）. SUV_max of VTT was significantly higher than that of BT（P<0.001）. There was no significant difference in SUV_max of primary tumor, SUV_max of VTT nor inferior vena cava diameter between 2 groups（all P>0.05）. Conclusion PET/CT has high detection accuracy for RCC with VTT and BT, also for tumor thrombus classification, but has limited ability to evaluate vein wall tumor invading.更多还原