少见部位骨软骨瘤的影像学分析

目的探讨X线平片、CT及MRI对少见部位骨软骨瘤的诊断价值。方法回顾性分析17例经手术病理证实的少见部位骨软骨瘤的X线平片、CT及MRI表现。其中7例行X线平片检查,6例行CT检查,5例行MRI检查。结果顶骨、颞骨、颧骨、鞍底、锁骨及跟骨各1例,耻骨2例,颈椎4例,距骨5例。X线平片及CT像上均可见软骨帽,9例可见肿瘤中心松质骨与母骨髓腔相互移行,1例肿瘤周缘软组织出现肿胀。在MRI上,肿瘤在T1WI上呈等、低信号,T2WI上以等低信号为主,其间夹杂斑点状高信号;增强扫描肿瘤呈不同程度的不均匀强化。结论综合运用多种影像检查方法可准确诊断少见部位的骨软骨瘤,并能在一定程度上判定肿瘤是否发生恶变。

The Imaging Diagnosis of Osteochondroma in Uncommon Locations

Objective To analyse imaging findings of osteochondroma in uncommon locations on plain film,CT and MRI.Methods Seventeen cases with histologically confirmed osteochondroma in uncommon locations were reviewed.Radiography was performed in 7 cases,CT in 6 patients and MRI in 5 cases.Results Osteochondroma located at parietal bone,temporal bone,malar bone,sella turcica,clavicalis and calcaneus in each one case,at pubis in 2 cases,cervical vertebra in 4 cases and huckle bone in 5 cases.Cartilage cap could be found on plain film and CT.9 cases showed spongy bone in osteochondroma centre move to pulp cavity of source bone.Soft tissue around tumor became swollen in one case.On MRI,lesions presented iso or hypointensity signal on T1WI and T2WI,and spotted hyperintensity signal on T2WI.All cases showed heterogeneous enhancement on MRI.Conclusion Osteochondroma in uncommon locations could be accurately diagnosed with synthetically applying various imaging methods,and judged malignant in some extent.