Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP view of the chest . Again demonstrated is a rounded opacity in the left aortopulmonary window , compatible with patient 's known pseudoaneurysm , unchanged . Minimal right basilar atelectasis is unchanged . No pneumothorax . Mild cardiomegaly is unchanged . Again seen is surgical removal of right proximal humerus including the head .
    OUTPUT:
    
No significant change in abnormal mediastinal contour , corresponding to known aortic pseudoaneurysm . Unchanged right basilar atelectasis .