结果：13例患者的病灶均位于两肺下法后基底段。
Results: All cases were located in the posterior segment of lower lobes of both lungs.
多部位梗死多于单部位梗死，后循环近段、远段同时梗死或远段梗死者，预后不良，基底动脉主干阻塞预后差。
Patients had poor prognosis with simultaneous proximal and distal territory involvement in the posterior circulation, and patients who had basilar artery occlusive lesions had very bad prognosis.
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