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目的：探讨弥漫性细支气管肺泡癌（ＤＢＡＣ）的影像学表现及其演变过程。材料和方法：回顾性分析１９９３年１月至１９９５年１２月的ＤＢＡＣ连续性病例，共１７例。１７例均有胸部平片，其中有体层摄影者１２例，有ＣＴ扫描者１０例。均经病理证实。观察ＤＢＡＣ的影像学表现及演变过程，同时探讨其影像学表现病理基础。结果：１７例肺部均有异常表现。其中磨砂玻璃征６例，病灶内蜂房样透亮区４例，病理性支气管气相５例，腺泡样结节５例，大片状肺实变５例，肿块６例。一般２种以上表现同时存在，病变发展的不同阶段出现不同表现。结论：磨砂玻璃征、病灶内蜂房样透亮区、病理性支气管气相、腺泡样结节为ＤＢＡＣ的特征性表现，不同表现为不同的病理时期。病变分布的演变过程为：肺段→肺叶→同侧肺→全肺。病变形态的演变过程为：腺泡样结节→磨砂玻璃样改变→实变。
Objective: To investigate the imaging features and evolution of diffuse bronchioloalveolar carcinoma (DBAC). Materials and Methods: A retrospective analysis of consecutive DBAC cases from January 1993 to December 1995 was performed in 17 patients. All 17 cases had chest radiographs, including 12 cases of tomographers and 10 cases of CT scans. All confirmed by pathology. Observe the imaging performance and evolution of DBAC, and explore the pathological basis of imaging findings. Results: 17 cases of abnormal lung performance. Among them, there were 6 cases of frosted glass sign, 4 cases of intravital hive-like translucent areas, 5 cases of pathological bronchial gas, 5 cases of acinar nodules, 5 cases of large patchy consolidation, and 6 cases of masses. In general, more than two types of performance exist at the same time, and different manifestations of different stages of lesion development occur. Conclusions: The frosted glass sign, intravital hive-like translucent area, pathological bronchial gas phase, and acinar nodular tuberculosis are the characteristic manifestations of DBAC, with different manifestations in different pathological stages. The evolution of lesion distribution is: lung segment → lung lobe → ipsilateral lung → whole lung. The evolution of lesion morphology is: acinar nodules → frosted glass changes → consolidation.