Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in semi-upright position . Comparison is made with the next preceding similar study of ___ . Position of previously described HD catheter is unchanged . Previously existing PICC line has been removed . There is now increasing density on the left lung base obliterating the left - sided diaphragmatic contour and clouding of the mid portion of left hemithorax . Considering that patient is in semi-upright position tilting significantly backwards , the described density most likely indicates further progression of the on previous examination suspected beginning pleural effusion . A semi-circular line running parallel to the chest wall circumference in the upper portion of the left hemithorax represents a skinfold . It is traversed by vascular lungs structures and thus not indicative for a pneumothorax . There are also some densities of lesser degree on the right lung base .
    OUTPUT:
    
Increasing pleural effusions . Should any doubt in such diagnosis exist , lateral chest view is recommended to identify the posterior pleural sinuses .