良性成骨细胞瘤的影像学诊断

目的探讨良性成骨细胞瘤的影像学特征。方法对23例良性成骨细胞瘤的X线、CT及MRI表现和临床资料进行回顾性分析,评价其影像学特征。结果 23例良性成骨细胞瘤中,囊性型10例,钙化骨化型13例;X线及CT主要表现为局灶性骨质破坏,多伴有膨胀性改变,钙化与骨化及周围骨质硬化缘,X线及CT对钙化及骨化的检出率分别为86.9%（20/23）和94.7%（18/19）。MRI检查中,囊性型于T1WI上呈等或低信号,T2WI上呈略高信号,脂肪抑制序列PDWI上呈明显高信号;钙化骨化型,骨质破坏区呈略长T1、略长T2信号,其内钙化、骨化及周围骨质硬化区呈明显低信号,MRI对钙化及骨化检出率为78.6%（11/14）,增强扫描骨质破坏区呈中等程度以上不均匀强化,钙化及骨化未强化。结论良性成骨细胞瘤具有一定的影像学特征,CT应作为诊断该病的首选检查方法。

Imaging Diagnosis of Osteoblastoma

Objective To evaluate the imaging characteristics of osteoblastoma. Methods The X-ray, CT and MRI findings of osteoblastoma were analyzed retrospectively in 23 cases to assess their imaging characteristics. Results In 23 case of osteoblastolna, cystic destruction 1 0 cases, calcification lesion 13 cases. The main X-ray and CT findings showed focal bony destruction, most of lesions presented expanding bony destruction,with calcifi- cation or ossification and edge sclerosis. X-ray and CT to calcification or ossification of lhe detection rate were 86.9% （20/23） and 94.7% （18/19）. In MRI findings, cystic destruction showed intermediate or slightly hypointense signal on T1 WI and siighlly high signal on T2WI, calcification or ossification and edge sclerosis presented evident hypoinlensc. MRI to calcification or ossification of the detection rate were 78.6% （ 11/14）, the enhancemenl of osteoblastoma is usually medium and inhomogeneous, and no enhancement with calcifica- tion and ossificalion. Conclusion osteoblastoma have the image charactcrislics and CT should to be the investigation of choice for the diagnosis.