Bilateral nodular opacities and hilar node enlargement in a 73-year-old man with cough

A 73-year-old Caucasian male, ex-smoker with a smoking history of 50 pack-years, presented to our department complaining of chronic cough, gradually progressive shortness of breath on exertion and fatigue during recent months. He did not report any chest pain or fever. The patient’s medical history only included arterial hypertension, while in the past he worked in the stone crushing industry.
Can you diagnose this man presenting with chronic cough and progressive shortness of breath on exertion and fatigue developing over several months? http://ow.ly/ekZd30k8VcM