肺炎多急性发病.常见有寒战高热、胸痛、咳嗽、咯铁锈色痰等症状,加以肺实变体征和X线表现,诊断并无困难。但近十余年来,肺炎常因症状消遥,病程迁延,体征缺如,X线不典型,而易与其他肺内浸润性病变相混淆,须加以鉴别。兹简述如下: Acute onset of pneumonia more common chills fever, chest pain, cough, slightly rust phlegm and other symptoms, to be signs of lung consolidation and X-ray findings, diagnosis and no difficulty. But over the past decade, pneumonia often because of symptoms disappear, duration of the disease, lack of signs, X-ray atypical, and easily confused with other pulmonary infiltrative lesions, to be identified. Here is a brief description: