A 74-year-old man was admitted to the hospital with a 4-day history of fatigue dyspnea and hemoptysis. Ten days before hospital admission, he began experiencing a right-sided chest pain associated with malaise, worsening dyspnea, and cough. He denied fever, night sweats, or weight loss, but his exercise capacity and stamina had declined over the most recent 2-month period. His medical history included right hemispheric stroke with minimal residual left hemiparesis and anemia of undetermined etiology. His medications included aspirin, 100 mg once daily.