CASE
A 50-year-old white female presented to the emergency department with complaints of progressive dyspnea of 2 days' duration. The patient had a history of hypertension and intravenous drug use for 15 years but had not used in the past 10 years. She had smoked 3 packs of cigarettes per week for the past 30 years. She denied any alcohol use. The patient denied fever, chills, chest pain, cough, wheezing, palpitations, or abdominal pain. The remaining review of systems was unremarkable. On physical examination, the patient had normal vital signs. Examination of the lungs revealed right-sided decreased air entry, reduced tactile fremitus, and basilar dullness to percussion. There were no crackles, wheezing, or rhonchi bilaterally. Cardiac, abdominal, and peripheral vascular examinations were all unremarkable. A chest radiograph was obtained (Figure 1). What does the radiograph show?
