100 Diagnostic Dilemmas in Clinical Medicine (2nd ed.)

A 57-year-old man presented to the emergency department complaining of a worsening cough. The cough had been present for approximately two weeks and was productive of green sputum. The patient had seen his general practitioner one week earlier and taken a course of amoxicillin for a presumed lower respiratory tract infection with no improvement of symptoms. He was febrile, experiencing frequent headaches and a feeling of general malaise, and had been unable to eat solid food for the last 48 hour