Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A patchy right middle lobe opacity is new since ___ with a somewhat linear configuration on the lateral view . The left lung is clear . The cardiac , hilar and mediastinal contours are unchanged . Trace right pleural effusion is present . No pneumothorax . No pulmonary edema is present .
    OUTPUT:
    
Although a new right middle lobe opacity appears somewhat linear on the lateral view thereby suggesting atelectasis , the patchy ill - defined appearance on the frontal view is non-specific , and pneumonia should be considered in this immunocompromised patient . Trace right pleural effusion .