<num>. left lower lobe anterior medial basilar opacity, which could potentially be due to infectious pneumonia in the appropriate clinical setting. adjacent small pleural effusion. <num>. mid and lower lung predominant reticular opacities are concerning for chronic interstitial lung disease. if the patient has symptoms of pneumonia, initial further evaluation with followup chest radiographs in <num> weeks after completion of antibiotic therapy would be suggested. if the interstitial abnormality persists at that time, high-resolution chest ct would be recommended. in the absence of infectious symptoms, ct would be recommended at this time. to further characterize both the left lower lobe abnormality in the more diffuse interstitial process.