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目的 探讨肺黏膜相关淋巴组织型(MALT)淋巴瘤的CT表现,提高对本病的认识,减少误诊.方法 回顾性分析12例经手术或穿刺活检病理证实的肺MALT淋巴瘤的CT表现及误诊原因.结果 12例病灶中结节或肿块型4例,斑片及实变型8例.4例肿块型病灶表现为分叶状,均发生于近肺门处,并可见“肺门延续征”.8例实变型病灶表现为其内密度较均匀,边界较清晰,即“粉刷墙征”,并见“充气支气管征”;4例实变范围较大,其内可见多发直径＜2 mm的微小气泡.增强扫描12例病灶均呈轻中度均匀强化,其中8例实变型可见“血管造影征”.12例误诊为肺癌4例,肺炎4例,恶性胸腺瘤1例.结论 肺MALT淋巴瘤具有一定影像表现特点,全面分析病史及影像表现,对减少误诊很有帮助.“,”Objective To investigate the CT imaging findings of pulmonary mucosa associated lymphoid tissue (MALT) type lymphoma and improve its diagnostic level.Methods The CT appearances of 12 pathologically proven cases of pulmonary MALT lymphoma were retrospectively analyzed.The reasons for misdiagnoses were analyzed.Results Of the pulmonary MALT lymphoma patients,4 cases had nodules and masses,and 8 cases had consolidation.In the patients with nodules and masses,all of them had shallow lobulated and distributed in hilar,with the “extend pulmonary hilar sign”.The patients with consolidation all had the “whitewashing sign” and air bronchogram as uniform density with clear edges.Four cases had larger lesions with multiple small bubbles (diameter less than 2mm).Of the 12 lesion,all cases showed mild or moderately homogenous enhancement on enhanced CT scans,while 8 had “angiogram sign”.Finally,4 cases were misdiagnosed as lung cancer,4 cases as pneumonia,and 1 case as malignant thymoma in this study.Conclusion Pulmonary MALT lymphoma has some exceptional imaging features,and the comprehensive analysis of clinical history and CT imaging could improve the accuracy of diagnosis,reduces the rate of misdiagnosis.