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 . Analysis is performed with the next preceding similar study obtained six hours earlier during the same day . Right - sided basal pigtail catheter remains in unchanged position . Amount of basal pleural effusions , slightly more on the right than left , also unchanged . Left subclavian Port - A - Cath system in unchanged position . The previously described small approximately 1 cm wide apical pneumothorax remains unchanged . Aeration of lung as before .
    OUTPUT:
    
Stable chest findings , no change in small left apical pneumothorax size .