多发性骨髓瘤的~(18)F-FDG PET/CT诊断价值

目的：探讨在氟18-脱氧葡萄糖（18^F-fluorodeoxyglucose,18^F-FDG）PET/CT（positron emission tomography/computed tomography）显像诊断多发性骨髓瘤（mul-tiple myeloma,MM）的价值。材料和方法：回顾性分析2005-082009-06经骨髓穿刺或病理活检证实的31例多发性骨髓瘤患者的PET/CT影像特征。结果：MM18^F-FDG PET/CT表现出一定特征,大致可分为：骨质破坏型（28例）,表现为不同程度骨质破坏,而无骨髓外脏器侵犯,代谢不同程度活跃,最大标准化摄取值（SUVmax）介于2.515.4,平均标准化摄取值（SUVavg）介于2.011.3;②髓外侵犯型（2例）,除骨质不同程度破坏外,另有髓外脏器（肝脏、脾脏及淋巴结等）侵犯,代谢均有不同程度活跃,SUVmax介于2.28.3,SUVavg介于1.76.5;③骨髓弥漫型（1例）,全身骨髓弥漫代谢活跃,SUVmax为13.4,SUVavg为8.8,但未见明显骨质破坏。结论：18^F-FDGPET/CT能较准确显示MM的病灶形态、范围及肿瘤活性,为MM的诊断和准确分期提供帮助。个别需与溶骨型多发骨转移癌及骨淋巴瘤鉴别。

Diagnostic Value of ~(18)F-FDG PET/CT in Multiple Myeloma

Purpose To investigate the diagnostic value of ~(18)F-flurorodeoxyglucose (~(18)F-FDG) PET/CT (positron emission tomography/computed tomography) on multiple myeloma.Materials and Method ~(18)FDG PET/CT imaging findings were retrospectively analyzed in 31cases with multiple myeloma proved by bone marrow aspiration or biopsy from August 2005 to June 2009. Results The PET/CT imaging characteristics were categorized into three types: ① osseous destruction (n=28): Osseous destruction with active metabolism was found in this type combined with no extramedullary organs involvement. The SUV_(max) ranged from 2.5 to 15.4, and the SUV_(arg) ranged from 2.0 to 11.3. ② Extramedullary organ involvement (n=2): Besides osseous destruction, extramedullary organs involvement were detected in this type demonstrating active metabolism in varying degrees. The SUV_(max) ranged from 2.2 to 8.3 and the SUV_(avg) ranged from 1.7 to 6.5. ③ Diffuse bone marrow infiltration (n=1): Diffuse hypermetabolism without osseous destruction was found in the whole body bone marrow with the SUV_(max) of 13.4 and SUV_(avg) of 8.8.Conclusions ~(18)FDG PET/CT can accurately demonstrate the morphology, extent and activity of multiple myeloma, thus facilitating the clinical staging, whereas multiple osteolytic osseous metastases and osseous lymphoma should be excluded for certain cases.