Ill-defined reticular and patchy opacities in the left greater than right hemithorax, particularly confluent at the left lung base, with a new small left pleural effusion. These findings raise concerns for multifocal infection or aspiration, with pulmonary edema being less likely.
Simple pleural effusion (Present) Aspiration (Uncertain) Air space opacity–multifocal (Uncertain) Edema (Uncertain)