背部弹力纤维瘤^(18)F-FDG PET/CT表现

^(18)F-FDG PET/CT manifestations of elastofibroma dorsi

目的观察背部弹力纤维瘤(EFD)的^(18)F-FDG PET/CT表现。方法回顾性分析26例EFD患者的^(18 )F-FDG PET/CT资料,比较男性与女性患者、年龄<72岁与≥72岁患者、体积<39cm^3与≥39cm^3病灶之间^(18)F-FDG最大标准摄取值(SUV_(max))及SUV_(max)与肝脏血池平均标准化摄取值比值(SUR-BP)的差异。结果26例患者中,19例EFD累及双侧,7例累及单侧(均为右侧);共45个EFD病灶,表现为位于肩胛下角内侧与后胸壁间被肩胛下肌、背阔肌、前锯肌、菱形肌包围区域的类圆形或梭形软组织肿物,密度接近或略低于周围正常肌肉组织,病灶放射性摄取较周围肌肉组织呈轻至中度增高。39个EFD病灶的^(18)F-FDG摄取低于肝脏血池本底,6个病灶的^(18 )F-FDG摄取高于肝脏血池本底。不同性别、年龄患者间及不同体积病灶间SUV_(max)、SUR-BP差异均无统计学意义(P均>0.05)。结论EFD的PET/CT表现具有一定特异性,有助于诊断。

Objective To observe 18 F-FDG PET/CT manifestations of elastofibroma dorsal(EFD).Methods 18 F-FDG PET/CT findings of 26 patients with EFD were retrospectively analyzed.The differences of maximum standard uptake(SUV max)of lesions and the ratio of SUV max to mean standardized uptake of liver(SUR-BP)were compared between males and females,patients aged<72 years and≥72 years,lesion volume<39 cm 3 and≥39 cm 3,respectively.Results Among 26 patients,there were 19 patients of bilateral EFD involvement and 7 of unilateral involvement(right lateral).There were total 45 EFD lesions in all 26 patients.All the lesions were found as round or fusiform soft tissue masses,located between inferior corner of scapula and posterior chest wall,bordered by the subscapularis,rhomboid,latissimus dorsi and serratus anterior muscles.The density of lesions were close to or slightly lower than that of the surrounding normal muscle tissue.Radioactive uptake of lesions increased slightly to moderately compared with the surrounding normal muscle tissue.Except for 6 lesions with higher 18 F-FDG uptakes,the uptakes of 18 F-FDG in the other 39 EFD lesions were lower compared with the hepatic blood pool.There was no significant difference of SUV max nor SUR-BP among EFD patients with different sex,age norlesion volume(all P >0.05).Conclusion 18 F-FDG PET/CT manifestations of EFD demonstrate some characteristics,and might be helpful to diagnosis of this disease.