CT扫描对肺隔离症的诊断价值

CT analysis of the bronchopulmonary sequestration

目的 :探讨CT扫描对肺隔离症的诊断价值。方法 :搜集经手术病理、主动脉造影证实的 2 1例肺隔离症。所有病例均行CT平扫及增强扫描 ,其中 5例行螺旋CT动态增强扫描。结果 :16例CT表现为含气体或液体的囊肿和 /或软组织肿块 ,5例肿块周围可见肺气肿。 16例非含气囊肿平扫密度均匀 ,增强扫描 7例无明显强化、5例为薄壁环形强化、4例为厚壁周围性强化。无强化区的病理成分为粘液、脓液或胶样液体。CT显示出 14支异常供血血管 ( 14 / 2 1) ,螺旋CT显示率 ( 4 / 5 )高于普通CT( 10 / 16)。结论 :肺隔离症的主要CT表现是囊肿、结节或肿块 ,增强CT扫描、螺旋CT动态增强扫描能发现平扫所不易显示的结节和肿块内部的囊性成分 ,有助于隔离肺异常供血血管的显示 。

Objective:To analyze the CT characteristics of the brochopulmonary sequestration.Methods:21 patients of pulmonary sequestration proved by surgery or angiography were studied.All patients underwent plain and contrast enhanced CT and five cases accepted dynamic contrast enhanced spiral CT examination.CT characteristics of 11 patients were correlated with patholology.Results:16 patients with all lesions presented as cyst containing air or fluid,or soft-tissue masses,and 5 with emphysematous lung surrounded.16 cysts,nodules or masses showed homogeneous density.Enhanced scanning showed no enhancement in 7 patients,thin-wall enhancement in 5,thick-wall enhancement in 4.Pathologically,the non-enhanced areas were mucus,pus,or glutinous fluid.Abnormal arterial supply from aorta was demonstrated in 14 sequestrations (80%).Spiral CT showed more anomalous systemic artery (80%) than conventional CT(62%).Conclusion:The main CT appearance of lung sequestration is cyst,nodule and mass.Enhanced CT can demonstrate the cystic contents that plain CT can not find,and also be helpful to demonstrate anomalous supplying artery.Spiral CT can show small anomalous supplying artery.