目的 探讨肺炎型细支气管肺泡 癌(PTBAC)的CT影像学特点及诊断及鉴别 诊断。方法 收集2010年1月至2015年11 月我院经病理证实的PTBAC 12例，回顾 性分析所有病例的CT特征。结果 病灶段 性分布2例，叶性分布6例，弥漫分布4 例。病变实变内血管造影征5例，枯枝征 6例，蜂房征4例，边缘磨玻璃征6例，叶 间裂膨隆征4例，空泡征或假囊征3例， 线样征2例。结论 PTBAC的CT表现具有一 定特征性，根据CT观察各类征象，结合 临床，可以提高对PTBAC的诊断正确性。

Objective To study the computer tomography(CT) features of pneumoniatype bronchioalveolar carcinoma(PTBAC), the diagnosis and differential diagnosis. Methods The features of 12 cases of PTBAC with pathologic results were retrospentively analyzed. Results Segmental distribution in 2 cases, lobar distribution in 6 cases, diffuse distribution in 4 cases. Angiogram sign in 5 cases, dead-tree-branch sign in 6 cases, honeycomb sign in 4 cases, crude glass opacity in 6 cases, bluging of interlobar fissure in 4 cases, vacuole sign or false void signin 3 cases, string sign in 2 cases. Conclusion PTBAC showed paticularly characteristic characteristic signs on CT, comprehensive analysis of imaging features plays an important clinicla role in diagnosis and differential diagnosis.