细支气管肺泡癌按世界卫生组织的组织病理学分型 ,属于肺腺癌的一种 ,但因其在治疗和预后有别于一般的肺腺癌 ,所以有时也将其单列为一型。发病率占肺癌的１%～３ %、肺腺癌的５%～８%。Ｘ线上表现各异 ,临床常易误诊。本文对其临床确诊治疗的２１例细支气管肺泡癌患者进行分析 Bronchioloalveolar carcinoma is a type of lung adenocarcinoma according to the histopathological classification of the World Health Organization. However, because of its difference in treatment and prognosis from the common lung adenocarcinoma, bronchioloalveolar carcinoma is sometimes classified as a single type. The incidence of lung cancer accounted for 1% to 3%, lung adenocarcinoma of 5% to 8%. X-ray performance varies, clinical often misdiagnosed. In this paper, 21 patients with bronchioloalveolar carcinoma diagnosed clinically were analyzed