Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly appears similar to prior examination though complete comparison is difficult given the presence of a moderate - to - large right subpulmonic pleural effusion as well as increased density in the right lung base , which may represent pneumonia . Prominent right hilar contour suggests lymphadenopathy . There is central vascular congestion along with mild interstitial pulmonary edema . There is no pleural effusion . Surgical clips project over the right axilla . The patient is status post right mastectomy .
    OUTPUT:
    
Moderate cardiomegaly with mild interstitial edema as well as moderate - to - large right - sided subpulmonic effusion and increased density at the right lung base which may represent concurrent pneumonia . Probable right hilar lymphadenopathy .