近年肺癌发病呈上升趋势 ,其中肺炎型肺癌亦不罕见 ,其Ｘ线胸片多以斑片影或大片状模糊表现 ,早期诊断非常困难 ,易误诊。本文对 3例肺炎型肺癌误诊为肺炎病例进行分析。1　病例资料例 1:男 ,5 2岁。因阵发性干咳 ,偶带新鲜血丝 1年入院。查体 :右下肺可闻及少许湿罗音。血白细 In recent years, the incidence of lung cancer has been on the rise. Among them, pneumonia-type lung cancer is not uncommon, and its X-rays are mostly patchy or large patches. Early diagnosis is very difficult and often misdiagnosed. This article analyzes three cases of pneumonia-type lung cancer misdiagnosed as pneumonia. 1 Case data 1: Male, 52 years old. Due to paroxysmal dry cough, occasionally with fresh bloodshot 1 year hospitalized. Physical examination: A few wet rales can be heard in the right lower lung. Blood white