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本文报告１２例类似胸内肿瘤的降主动脉增宽和扭曲。其中４例曾被误诊为纵隔或肺肿瘤。全部病例年龄均在６０岁以上。主动脉因硬化、退行性变而增宽、延长并扭曲。其Ｘ线表现特点为降主动脉呈“Ｓ”形扭曲，在纵隔内形成类似肿瘤的半圆形或类圆形致密影，或从纵隔凸向肺野，适当角度的斜位可显示降主动脉扭曲之行径，其前后壁平行，透视下可见轻微搏动。作者讨论了上述Ｘ线表现的解剖和病理基础、Ｘ线检查方法和鉴别诊断要点。
This article reports 12 cases of thoracic tumors of the descending aorta widening and distortion. Four of them were misdiagnosed as mediastinal or lung tumors. All cases are over 60 years of age. Aortic due to hardening, degeneration and broaden, prolong and distort. The X-ray performance of the descending aorta was “S” -shaped distortion in the mediastinum to form a tumor similar to the semicircular or round-like compact shadow, or convex from the mediastinum to the lung field, the appropriate angle of the oblique can show the main Arterial twisting of the act, the front and back walls parallel to see a slight pulsation under fluoroscopy. The authors discuss the anatomy and pathology of the above X-ray findings, X-ray examination methods and key points of differential diagnosis.