目的探讨弥漫型细支气管肺泡癌临床及影像学特点。方法收集经病理证实的弥漫型细支气管肺泡癌20例,全部病例均经二次以上胸片及1次以上CT检查。结果X线平片及CT所见有以下特点:分布不均,中下肺为主,肺尖常无分布;病灶大小不一致;多数结节1～4 mm大小;融合结节可达3 cm;结节密度较淡;融合结节密度不均,边缘中等或模糊;可见结节征、分叶征和空泡征。60%伴有实变阴影、实变阴影大小不一。可表现为片状、斑片状阴影,或为肺段或大叶性实变,与结节灶病灶同时存在。结论漫型细支气管肺泡癌相对少见,临床症状缺乏特异性,影像学表现复杂,易于肺炎及肺结核相混淆。应早期采取病理诊断。 Objective To investigate the clinical and imaging features of diffuse bronchioloalveolar carcinoma. Methods Twenty cases of diffuse bronchioloalveolar carcinoma confirmed by pathology were collected. All cases were diagnosed with secondary chest radiographs and one or more CT examinations. RESULTS: The X-ray plain film and CT findings had the following characteristics: uneven distribution, mainly in the middle and lower lung, often no distribution of the apex; lesion size is inconsistent; most nodules 1 ~ 4 mm in size; fusion nodules up to 3 cm; The density of nodules was light; the density of fusion nodules was uneven and the edges were moderate or fuzzy; nodules sign, lobulated sign and vacuole sign were seen. 60% is accompanied by consolidation shadows and real shadows vary in size. Can be expressed as patchy, patchy shadows, or lung segment or large leaf consolidation, and the presence of lesions in the same period. Conclusion Diminutive bronchioloalveolar carcinoma is relatively rare, the clinical symptoms are lack of specificity, the imaging features are complex, and it is easy to be confused with pneumonia and tuberculosis. Pathological diagnosis should be taken early.