较大的鳞状细胞癌，其中部分肿瘤组织出现空洞，可能因为肿瘤的生长速度过快，超出了血液供应的能力。鳞状细胞癌是原发性肺癌的主要类型，主要发生于经常吸烟者
This is a larger squamous cell carcinoma in which a portion of the tumor demonstrates central cavitation, probably because the tumor outgrew its blood supply.Squamous cell carcinomas are one of the more common primary malignancies of lung and are most often seen in smokers.
