纵隔支气管源性囊肿的CT诊断探讨

目的　探讨纵隔支气管源性囊肿CT诊断及鉴别诊断。方法　回顾分析经病理证实 2 0例纵隔支气管源性囊肿CT表现。结果　 14例位于中纵隔气管旁 ,其中 12例位于右侧 ,2例位于左侧 ;5例位于右中纵隔隆突部支气管旁 ;左后纵隔食管旁 1例。呈圆形或卵圆形肿块 ,12例呈囊性密度 ,8例呈软组织密度 ,增强 5例囊内容物无强化 ,3例软组织密度病变强化后呈囊样低密度。结论　支气管源性囊肿多发于中纵隔气管旁 ,CT平扫加增强有助于诊断和鉴别诊断 ,结合临床资料多数可确诊。

Bronchogenic Cyst of the Mediastinum:CT Diagnosis

Objective To investigate CT diagnosis and differential diagnosis of bronchogenic cysts of mediastinum.Methods CT findings of 20 cases with bronchogenic cyst pathologically proved were studied retrospectively.Results The lesions were found in paratracheal middle mediastinum in 14 cases (12 in the right side and 2 in the left side),5 cases in the bronchial paracarinal right middle mediastinum and 1 case in paraesophageal left posterior mediastinum.The cysts were round or ovale,12 were of cystic density,8 showed the density of soft tissue.On contrast-enhanced scans,the cystic content of mass was not enhanced in 5 ,of them,3 masses which were of the density of soft tissue on precontrast-enhanced scans appeared cystoid low density.Conclusion Bronchogenic cyst is predominantly found in paratracheal right middle mediastinum.CT scan is helpful in diagnosis and differentiating dingnosis of bronchogenic cysts,the accurate diagaosis for this cyst can be done combined with clinic data.