A 52-year-old man is admitted to the pulmonary service with complaints of recurrent hemoptysis of mild to moderate severity, ongoing for the past 6 to 8 months, with occasional expectoration of blood measuring about 200 mL. The patient also reports a chronic nonproductive cough without fever, chills, weight loss, or night sweats. Past medical history includes an emergency department admission at the age of 18 years for fever, cough, dark yellowish productive sputum, and pleuritic chest pain. Since then, the patient denies a history of asthma, bronchitis, or pneumonia. He is a nonsmoking farmer who has lived in Tennessee all his life. Physical examination is remarkable only for irregular heartbeat, egophony, and whispered pectoriloquy over the right upper lung fields. His only medication is amiodarone, 200 mg daily. In the emergency department, the following chest xrays and computed tomography (CT) scans are obtained.