Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a vague opacity projecting over the right lower lung which on the lateral view demonstrates well - defined posterior margins and is suspicious for pleural - based mass . Rounded nodule over the left lung base is likely a nipple shadow . The lungs are otherwise clear . Mild cardiac enlargement is noted and tortuosity of the descending thoracic aorta . Degenerative changes are noted in the shoulders .
    OUTPUT:
    
Pleural - based masslike opacity at the right lung base anteriorly for which chest CT is suggested .