一、概述临床和X线一般将肺癌简单地分中央型及外围型。前者癌起源于气管、主支气管和叶支气管的粘膜上皮或腺体,以鳞癌(表皮样癌)最多,次为小细胞癌。后者起源于肺段及其以下的各级支气管,直至终末细支气管和肺泡Ⅱ型细胞;腺癌和大细胞癌大多数 First, an overview of clinical and X-ray lung cancer is generally divided into central and peripheral type. The former originated from the mucosal epithelium or glands of the trachea, the main bronchi, and the leaf bronchi, with the most squamous cell carcinomas (epitheloid carcinomas) and the second being small cell carcinomas. The latter originated in the bronchus of the lung segment and below, until terminal bronchioles and alveolar type II cells; most of adenocarcinomas and large cell carcinomas