动脉瘤样骨囊肿的影像学诊断

目的评价影像学检查对动脉瘤样骨囊肿（ABC）的诊断价值。方法对16例经手术病理证实的ABc的影像学表现进行回顾性分析。16例均拍X线平片，9例CT扫描，6例MRI扫描。结果16例ABE发生于长管状骨9例，脊柱4例，短骨及扁骨3例。13例病变呈膨胀性骨质破坏，10例病变边缘可见硬化，5例合并病理性骨折，8例病变可见分隔，11例可见典型的液一液平面，3例病变周围可见软组织异常改变，其中2例软组织肿胀，1例软组织肿块，12例病变内密度和（或）信号显示不均匀。结论动脉瘤样骨囊肿具有一定的影像学特征，CT和MRI对ABC诊断较平片有优势，综合影像学检查能提高ABC诊断符合率。

Imaging diagnosis of aneurysmal bone cyst

Objective To assess the the value of imaging in diagnosing aneurysmal bone cyst(ABC). Methods The imaging features of 16 cases of ABC proved pathologically were analyzed retrospectively. Imaging materials includes X-ray plain radio-graphy (n=16), CT scan(n=9) and MRI(n=6). Results Among the 16 cases, the lesion was located in long tubular bone in 9, spine in 4, shortbone and flatbonein 3. The lesions sppeared asepanding bony destruction in 13 cases, asteosclerosis in 10, accompanied bypothological fracture in 5, intemal septations in 8, fluid levels in 11, soft tissue masses in 3 and the lesions were heterogeneous signal or density of the lesoions in 12. Conclu- sion The imaging features of ABC has some characteristics.CT and MRI are superior to plain film.A conprehensive imaging modality can improve diagnostic accuracy of ABC.