淋巴道肺转移癌是肺内外原发性癌转移到纵隔及肺门淋巴结后,再沿淋巴管向肺组织逆行蔓延的一种特殊转移形式。临床症状具有明显进行性呼吸困难,而胸部体征并非特异,故需 X 线检查帮助诊断。本症之 X 线表现与血行性肺转移瘤有根本区别, Lymphatic metastasis is a special type of metastasis in which the primary and metastatic lung cancers metastasize to the mediastinum and hilar lymph nodes and then retrogradely spread along the lymphatic vessels to the lung tissue. Clinical symptoms have obvious progressive dyspnea, and chest signs are not specific, so X-ray examination is needed to help diagnosis. The X-ray appearance of this disease is fundamentally different from that of hematological lung metastases.