支气管内错构瘤的CT诊断及误诊分析

目的：探讨支气管内错构瘤的多层螺旋CT表现，并分析误诊的原因，提高对该病的诊断水平。方法：回顾性分析2008年-2012年的6例被CT误诊后经病理证实的支气管内错构瘤的CT表现。结果：6例支气管内错构瘤病灶均位于大支气管内，其中右侧支气管4例，左侧支气管2例。行增强扫描的4例中未见强化2例，2例轻中度强化。伴阻塞性肺不张5例、钙化2例，均未见脂肪密度。6例支气管内错构瘤误诊为肺癌的4例，误诊为结核1例，误诊为异物1例。结论：支气管内错构瘤CT表现不典型，易致误诊，结合病理检查有助于确诊。

An analysis of CT diagnosis and misdiagnosis of endobronchial hamartoma

Objective：To investigate the multi-slice CT scan features of endobronchial hamartoma and to analyse the causes for misdiagnosis so as to elevate the diagnosis level. Methods：6 cases of endobronchial hamartoma,admitted during 2008--2012 ,which were misdiagnosed by CT but proved by pathology were retrospectively reviewed and analyed. Results：In the 6 cases,all were situated in large bronchi,4 cases in the right lung and 2 cases in the left lung,5 cases with obstructive atelectasis and 2 cases with calcification inside. None of them was found with fat density inside. In the 4 cases of endobron chial hamartoma, 2 cases showed no enhancement and 2 cases enhanced slightly and moderately. 4 cases were misdiagnosed as lung cancer, 1 case was misdiagnosed as tuberculosis and one case was misdiagnosed as foreign body. Conclusion： The CT features of endobronchial hamartoma are not typical so the disease is misdiagnosed easily,but these features combined with pathology can improve the diagnosis accuracy.