Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A Pleur -x catheter is seen terminating in the upper portion of the right lung . Compared to prior chest radiograph from ___ , there is a persistent moderate right - sided pleural effusion , slightly improved in the interval , with a new small air - fluid level in the right lung base suggesting a small hydropneumothorax component . Increased right basilar opacity may reflect atelectasis , although infection is not excluded . Patchy left basilar opacity is also slightly worse in the interval . The cardiac , mediastinal , and hilar contours are unchanged . Mild pulmonary vascular congestion is noted . Deformity of the left humeral head is chronic .
    OUTPUT:
    
1 . Moderate right - sided pleural effusion with increased right basilar opacity , likely atelectasis , though infection is not excluded . 2 . A new small air - fluid level in the right lung base suggests a small hydropneumothorax component . 3 . Worsening left basilar opacity could indicate atelectasis , but infection is also not excluded in this region . 4 . Mild pulmonary vascular congestion .