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目的总结异常体动脉供应正常左下肺基底段在胸部X线片和螺旋CT上的特征性表现。方法回顾分析5例异常体动脉供应正常左下肺基底段的胸部X线片和螺旋CT资料。结果5例异常体动脉供应正常左下肺基底段在胸部X线片上均表现为心后区肿块,左下肺动脉纹理细小,受累左下肺区域无正常肺动脉分支影分布,但有异常增粗纹理。CT上5例均表现为受累肺组织体积轻度缩小,支气管通畅,2例肺实质呈磨玻璃状改变。5例均可见左下肺动脉在背段动脉起始远侧缺如,增粗扭曲的异常体动脉起自降主动脉,其扩张的分支分布于受累肺段。1例血管造影表现与CT相仿。结论该病在胸部X线片上的表现有一定特征性。增强螺旋CT扫描可明确诊断,以避免创伤性的血管造影和致命的穿刺活检。
Objective To summarize the characteristic manifestations of abnormal basilar artery supply in the left lower pulmonary basal segment on chest X-ray and spiral CT. Methods The data of chest X-ray and spiral CT in 5 cases with abnormal body artery supplying normal basal segment of left lower lung were retrospectively analyzed. Results The abnormal basilar artery in 5 cases showed normal left basal basal segment in the chest X-ray showed the posterior area of the tumor, the left lower pulmonary artery fine texture, involvement of the left lower lung area without normal pulmonary artery branch shadow distribution, but with abnormal thickening texture. Five cases of CT showed lesions of affected lung tissue slightly reduced, bronchial patency, two cases of lung parenchyma glassy changes. In 5 cases, the left lower pulmonary artery was found far from the origin of the dorsal artery. The abnormally thickening and distorted artery began to descend from the descending aorta. The dilated branches distributed in affected lung segments. A case of angiography and CT similar performance. Conclusion The performance of the disease in the chest X-ray film has a certain characteristic. Enhanced spiral CT scan can confirm the diagnosis to avoid traumatic angiography and fatal biopsy.