Persistent retrocardiac left lower lobe opacity may represent posttreatment effects, atelectasis, sequelae of aspiration, or developing infection. No evidence of pleural effusion, pulmonary edema, or pneumothorax is seen.
Simple pleural effusion (Absent) Edema (Absent) Atelectasis (Uncertain) Aspiration (Uncertain) Simple pneumothorax (Absent) Pneumonia (Uncertain)