Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hypoinflated with crowding of vasculature . There is mild cephalization of vasculature . Subtle retrocardiac opacity is noted . No pleural effusion or pneumothorax . Stable mild cardiomegaly . Mediastinal contour and hila are unremarkable . Limited assessment of the osseous structures are notable for severe degenerative changes of bilateral humeral heads with osteophyte formation , and joint space narrowing . No displaced rib fracture .
    OUTPUT:
    
1 . Vascular congestion with mild cardiomegaly . 2 . Retrocardiac opacity is worrisome for pneumonia in the appropriate clinical setting . Differential includes asymmetric vascular congestion .