特殊部位骨巨细胞瘤的CT、MR及DSA表现

目的 探讨特殊部位骨巨细胞瘤的影像学表现,提高诊断及鉴别诊断水平. 方法 回顾分析经手术病理证实的11例特殊部位骨巨细胞瘤患者资料,分析其CT、MRI及DSA表现.11例骨巨细胞瘤,有4例位于髂骨,3例位于骶椎,2例位于坐骨,跟骨及颞骨各1例. 结果 (1)CT:表现为膨胀性、溶骨性骨质破坏区;无明显钙化,无明显骨膜反应.(2)MRI:T_1WI以等低信号为主,T_2WI表现以等或稍高为主混杂信号.5例患者T_1WI、T_2WI肿块内见曲线状低信号带,2例可见亮斑征.(3)DSA:肿瘤血供丰富,供血动脉增粗扭曲,可见肿瘤血管及肿瘤染色.结论综合运用影像学成像手段,可提高对特殊部位骨巨细胞瘤的认识.

CT,MRI and DSA Appearances of Giant Cell Tumors of Bone in Unusual Sites

Objective To investigate retrospectively CT,MRI and DSA appearances of giant cell tumors(GCT) of bone in unusual sites,in order to improve the diagnosis of it.Methods CT,MRI and DSA features of GCT in 11 cases proved by surgery and pathology,were retrospectively analyzed.GCTs located in iliac bone in 4,sacral vertebrae in 3,ischial bone in 2, calcaneus and temporal bone in one respectively.Results (1) At CT,the tumors were mainly showed as expanding growth and osteolytic destruction,without periosteal reaction and calcification.(2)At MRI,the tumors were hypo-,isointensity on T_1WI and heterogeneously iso, hyperintensity on T_2WI.Low intensity curvilinear strips inside the tumor on T_1WI and T_2WI were found in 5 patients,and "bright patches sign" on T_2WI were also displayed in 2 cases.(3)At DSA,abundant blood supply to the tumors was demonstrated,the thickened and twisted feeding artery and,"tumor's stain sign" were also found.Conclusion To analyse imaging data synthetically,including CT,MR imaging and DSA,can improve the knowledge of GCT of bone in unusual sites.