CT薄层扫描对于周围型小肺癌的诊断价值

Peripheral small lung carcinoma:computed tomography findings

目的研究周围型小肺癌于CT薄层扫描的表现,并确定提示其诊断的某些继发征象之发生率。方法48例可疑周围型小肺癌患者均经CT薄层(2～3mm)扫描,并预期地分析了其CT征象。结果48例周围型小肺癌中,细支气管肺泡癌24例,腺癌11例,鳞癌6例,小细胞癌5例,以及未分化癌2例。周围型小肺癌的主要CT征象有:深分叶征见于43例(90%),边缘毛刺征36例(75%),空泡征27例(56%),胸膜凹陷征38例(79%),以及血管集束征33例(69%)。结论在周围型小肺癌诊断中,CT征象起着重要作用,尤其薄层扫描能够更加清晰地显示上述诸征象,因而能够提高小肺癌的确诊率。

Objective To investigate the appearance of peripheral small lung carcinoma (PSLC) on CT thin slice scans,and to determine the frequence of signs suggestive of this diagnosis.Methods Forty- eight patients with suspected PSLC underwent CT thin slice(2～ 3 mm)scans.CT features of 48 cases with PSLC were prospectively analyzed for pattern and secondary signs suggesting the diagnosis.Results PLSC of 48 cases had one of the following patterns:capillary broncho- alveolar carcinoma(24),adenocarcinoma(11),squamous carcinoma(6),small cell carcinoma(5)and non differentiated carcinoma (2).Among 48 cases with PSLC,main signs on CT thin slice scans were found to be deep lobulation sign in 43 cases (90 % ),marginal spiculated sign in 36(75 % ), vacuole sign in 27 (56 % ),pleural indentation sign in 38(79 % ),and vascularnotch sign in 33 (69 % ).Conclusion CT signs of PSLC play an important role in the diagnosis,especially thin slice scan can more clearly reveal the signs as above mentioned and therefore it can improve the accuracy to diagnose PSLC.