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1·Results Among the 266 cases, the rate of SVCS caused by right superior bronchial disease is 62.9%, and the next is the right superior mediastinum disease.

结果266例患者中以右上肺病变引起的上腔静脉综合征占62.9%，其次是右上纵隔病变。

2·Because the trachea and thyroid gland adjoin to the subglottic area, the tumor invades them along with the superior mediastinum and lung by the way of paratracheal lymph drainage.

以其和气管及甲状腺密接的解剖相关，常使肿瘤向下及向外侵犯，并借由气管旁淋巴组织转移到上纵膈腔及肺部。