镜下，细支气管肺泡癌由柱状细胞构成，柱状上皮细胞沿肺泡壁增生。细胞分化良好。总的来说，比大多数其它原发性肺癌预后要好。
Microscopically, the bronchioloalveolar carcinoma is composed of columnar cells that proliferate along the framework of alveolar septae. The cells are well-differentiated. These neoplasms in general have a better prognosis than most other primary lung cancers.
