Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chronic right middle lobe collapse is re-demonstrated . There is no new consolidation or pleural effusion . However , a mass - like opacity at the right hilus has gradually grown more prominent since ___ . Bibasilar opacities have slightly improved . Moderate cardiomegaly is stable . There is no pneumothorax .
    OUTPUT:
    
Chronic right middle lobe collapse with associated rounded contour of the right hilum . A contrast enhanced chest CT is recommended to evaluate for a hilar or endobronchial mass such as carcinoid . Stable moderate cardiomegaly .