A 50-year-old man who has worked in a coal mine for 25 years presents with a chronic cough and shortness of breath
A 50-year-old man who has worked in a coal mine for 25 years presents with a chronic cough and shortness of breath. He is a smoker. His chest X-ray shows upper lobe predominance with small nodular opacities and large opacities (>1 cm).
What is the most likely diagnosis?
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