It is investigated in bilateral hilar lymph node,carina lymph node and posterior lymph nodes of venacava which is the most common lymph node enlarge-ment in central-type lung carcinomas.

• 中心型肺癌/淋巴结肿大以肺门淋巴结肿大、隆突下淋巴结肿大、气管前腔静脉后淋巴结肿大为著；