This 58-year-old retired enineer st

This 58-year-old retired enineer stated that he had chron ic bronchitis characterized by an early morning cough productive of whitish yellow sputum for about 10 years. Because of this and arthritis of the knees he retired 8 years ago. Several months ago, a cough somewhat different from that ascribed to bronchitis appeared and has become progressively worse. This cough got worsedue to smoking cigarettes. (I pack per day for 4 years), and he stopped smoking one month ago. The cough then seemed to have improved, but 3 weeks ago he noted blood-tinged sputum.Two weeksago he developed a sharp stabbing pain in the left chest, at first somewhat but later actually pleur it ic胸膜炎的 for a 48-hour period. Since that time the pain has gradu ally subsided except for sharp twinges刺痛 associated with movement of chest wall or cough ing. During this 2 week interval, he has had a low-grade fever, some anorexia, slight weight loss, but no chills. No dyspnea呼吸困难. Admission chest x-ray was said to show a oval-shaped density with suspicious cavity in the left mid-lung field.