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4312 Radiology

A 24-year-old male law student presents with a 3-wk history of increasing dyspnea. He has a history of chronic sputum production of about 100 cc of purulent material each day for many years. In the past, he was hospitalized for a left pneumothorax. He is on inhaled bronchodilator as an outpatient. CXR is shown below.The most helpful treatment option would be

AIncrease bronchodilator therapy
BSta broad-spectrum antibiotic therapy
CInitiate anti-pseudomonas antibiotic regimen
DSta oral steroids
Radiology
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