肺内孤立结节的CT分析

CT Analysis of Solitary- Pulmonary Nodules

目的:通过观察肺内直径小于3厘米结节的轮廓与结节肺界面的变化探讨其定性指征。村料和方法:70例(39例肺癌31例良性结节,均经病理证实)的CT片进行回顾分析。结果:肺癌结节周围肺野内细长索线影出现率为46.2％,良性结节为16.1％(P<0.01),两者有显著差别;肺癌结节周围出现粗长索条影15.4％。良性结节为41.9％(P<0.025),差别显著,肺癌结节出现中深分叶率为51.3％,良性结节为16.1％(P<0.01)。结论:走行笔直、僵硬的细长索线影与毛刺征一样,多出现在肺癌结节,与毛刺有同等诊断价值,良性结节周围多出现粗大的索条影。肺癌结节多有中深分叶,与良性结节多为浅分叶不同。以上征象有助于肺内的良恶性鉴别。

Purpose: To evaluate the qualitative signs of solitary pulmonary nodules (SPN)(diarneter≤3cm) by means of studying the nodule-lung interface. Methods: Retrospective CT study of 70 cases (39 malignant and 31 benign) of SPN(diameter≤3cm) proved pathologically. Results: Slim-long linears (length≥2cm) in perinodular area presented more commonly in lung cancers than in benign nodules (p<0.01). Benign pulmonary nodules mostly appeared with regular, smooth edges, or merely superficial lobulation, middle or deep lobulation were seen only in 5 cases (16.1%). On the contrary, 20 cases (51.3%) of lung cancers were deeply lobulated. Conclusion: It was concluded that slim-long linears have equal diagnostic value with spiculations, and are very helpful to differential diagnosis between malignancy and benignancy of SPN. Deep lobulation is another important sign in CT differentia! diagnosis of peripheral SPN.