Left lung base opacification may represent pleural effusion with adjacent airspace disease, potentially indicating pneumonia or aspiration. The presence of a calcified granuloma and reticular opacification/fibrosis in the right upper lobe raises the possibility of granulomatous infection; reactivation tuberculosis cannot be excluded.
Simple pleural effusion (Uncertain) Aspiration (Uncertain) Fibrosis (Present) Pneumonia (Uncertain)