A 58-year-old man with a 10-year history of smoking presents with dyspnea and chest pain. Chest X-ray shows a right-sided pleural effusion. Pleural fluid analysis reveals exudative effusion with LDH 450 IU/L, protein 4.2 g/dL, and negative cultures. What is the most common cause of pleural effusion in this clinical scenario?

See the options, answer & explanation

Sign in free to reveal the answer choices, the correct answer, the detailed explanation, and AI-powered insights for this question.