胸主动脉瘤临床不多见,主要症状与临床多见的纵深隔肿瘤和肺癌相似。主动脉瘤、主肺动脉瘤在影像学上均可表现为纵隔内或肺内占位。典型的主动脉瘤除血管造影外,US、CT、MRI、DSA都能为诊断提供依据。但是由于基层医院的条件限制,病史不详细,临床表现不典型和检查不到位,导 Thoracic aortic aneurysm is rare clinical, the main symptoms of clinical and more common deep septal and lung cancer similar. Aortic aneurysm, the main pulmonary aneurysm in the imaging can be expressed as mediastinal or intrapulmonary space. Typical aortic aneurysms in addition to angiography, US, CT, MRI, DSA can provide the basis for the diagnosis. However, due to the conditions of grass-roots hospitals, history is not detailed, atypical clinical manifestations and check is not in place, guide