细支气管肺泡癌占所有肺部原发肿瘤不足3%,但由于其特殊的临床表现和病理特征引起人们的极大关注。许多不同起源的肿瘤细胞在气管远端可形成同样的组织结构类型。细支气管肺泡癌的起源限于细支气管或肺泡,它不包括来自支气管或远处的转移癌。肿瘤产生于细支气管上皮的纤毛细胞、粘液细胞或柱状细胞,或产生于肺泡Ⅱ型细胞。所有细胞呈单层沿气水壁生长,肺泡的特殊环境——食物、氧气、生活空间很 Bronchioloalveolar carcinoma accounts for less than 3% of all primary lung tumors, but due to its special clinical features and pathological features caused great concern. Many tumor cells of different origins can form the same type of tissue structure distal to the trachea. The origin of bronchioloalveolar carcinoma is limited to bronchioles or alveoli, it does not include metastatic cancer from the bronchi or distant. Tumors arise from cilia cells, mucous cells or columnar cells in the bronchiolar epithelium, or from alveolar type II cells. All cells grow monolayers along the air-water wall. The special environment of the alveoli is food, oxygen and living space.