周围型肺错构瘤的多层螺旋CT表现

目的:探讨肺错构瘤的多层螺旋CT(MSCT)表现,以提高CT诊断水平.方法:回顾性分析经手术病理证实的32例肺错构瘤的MSCT平扫及22例MSCT动态增强扫描的特点.结果:MSCT上所有结节边缘光滑.结节内含有脂肪密度(无钙化)的12例,占37.5%,既有脂肪又有钙化的8例,占25.0%,只有钙化的2例,占6.3%.增强扫描(22例)强化值<20HU的20例,占90.9%,强化形态呈间隔状强化16例,占72.7%.结论:肺错构瘤的MSCT表现有一定的特征性,边缘光滑、结节内含有脂肪和钙化有助于诊断,动态MSCT增强扫描有助于与周围型肺癌的鉴别诊断.

The Findings of Multi--Slice CT in Pripheral Pulmonary Hamartoma

Objective:To research the appearances of multi-slice CT(multi-slice CT MSCT)in pulmonary hamartoma so as to improve the CT diagnostic accuracy.Methods:The CT and pathological findings of 32 cases of pulmonary hamartoma were analyzed.Dynamic contrast enhancement MSCT scanning were performed in 22 cases.All cases were confirmed by surgical operation and pathology.Results:All hamartomas had smooth edge on MSCT.Focal fat without calcification inside were present in 12 of 32 cases(37.5%),focal fat and calcification inside in 8 of 25cases(25%),calcification without fat inside in 2 of 32 cases(6.25%).The CT contrasted value was less than 20 Hu in 20 of 22 cases(90.9%).Contrast-enhancing septa were present in 16 of 22 cases(72.7%). Conclusion:Some specific MSCT features,including smooth edge,calcification and fat inside,are useful for diagnosis of pulmonary hamartoma.Dynamic contrast enhancement MSCT scanning is useful for differentiating pulmonary hamartoma with peripheral lung carcinoma.