Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . Mediastinal and hilar contours are unremarkable . The pulmonary vasculature is not engorged . Ill - defined relatively symmetric alveolar opacities are noted in both lung bases . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Findings concerning for multifocal pneumonia , and given the patient 's HIV status , atypical organisms such as PCP should be considered .