Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is a small right pleural effusion . A rounded density better seen on the lateral projection is located at the right medial lung base and measures approximately 3 .5 x 3 .6 cm , concerning for mass . Right basal atelectasis likely also present . No overt edema . No left effusion . Heart size is grossly stable . Aorta is unfolded . Bony structures appear grossly unchanged with chronic degenerative disease at both shoulders again noted .
    OUTPUT:
    
New from prior is small right pleural effusion , right basal atelectasis and apparent mass at the right medial lung base measuring up to 3 .6 cm . CT advised .