Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views have been obtained with patient in upright position . Comparison is made with the next preceding similar study of ___ . Left - sided subclavian approach Port - A - Cath system unchanged . Heart size remains normal and thoracic aorta and mediastinal structures unaltered . No pulmonary vascular congestion . The right - sided pleural density occupying and obliterating the right lateral and posterior pleural sinus remains unchanged . Position of previously described small caliber drainage catheter is also unchanged . Noteworthy is that the posterior pleural sinus density has clearly regressed on the right side , favoring the assumption that the density is organized and no free fluid remains . The left hemithorax remains normal and unchanged .
    OUTPUT:
    
Stable appearance of right - sided pleural density without signs of progression .