Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal tube tip projects 6 .9 cm cephalad to the carina . Left PICC tip projects over the low superior vena cava . Nasogastric tip projects below the diaphragm , however the side hole projects at the level of the gastroesophageal junction . Layering left pleural effusion is unchanged . Left mid and upper lung opacities have increased . Diffuse interstitial markings throughout the remaining lungs are unchanged . Heart size is not enlarged . Mediastinal silhouette is not widened .
    OUTPUT:
    
Increased opacification of the left upper and left mid lung may be secondary to pulmonary edema or developing pneumonia .