简要病历:患者男性,64岁。因“左下胸痛2个月余,反复发热10余天”于2006年4月7日入院。患者于2006年2月初无明显诱因下出现左下后背部针刺样疼痛,痛呈间歇性,咳嗽后加重。稍有咳嗽,少量白色粘痰,同时感觉于活动后气促。无低热、盗汗等症状。因胸痛能耐受故未予重视。2月23日因 Brief medical history: Male patient, 64 years old. Because of “left lower chest pain more than 2 months, repeated fever more than 10 days” on April 7, 2006 admission. Patients in early February 2006 no obvious incentive to appear under the left back acupuncture-like back pain, pain was intermittent, increased after coughing. A little cough, a small amount of white phlegm, and feel shortness of breath after the event. No fever, night sweats and other symptoms. Due to chest pain can not tolerate so no attention. February 23 due