Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The aorta is calcified and unfolded . The hilar and mediastinal contours are normal . Redemonstrated is a diffuse chronic interstitial abnormality with an most pronounced at the bases . The lungs appear to be hyperinflated . A 1 .3 cm nodular density is seen projecting in the region of the right posterior fourth rib . More diffuse hazy opacity is noted along the right mid - chest wall laterally . There is no evidence of a pneumothorax or pleural effusion . There is no upper zone redistribution or new pulmonary edema .
    OUTPUT:
    
1 . No significant interval change compared to the most recent prior exam performed at 8 :53 p .m . on the same day . 2 . Diffuse interstitial abnormality most pronounced at the bases . Of note , this has progressed significantly compared with an outside CXR from IOM dated ___ . While this could be related to enphysematous changes in the setting of hyperinflation , the possibility of a superimposed interstial process that has developed in the interim can not be excluded . Moreover , a superimposed infectious process or superimposed CHF in an atypical distribution can not be excluded . 3 . 1 .3 - cm nodular density in the upper right lung for which a chest CT is recommended to evaluate for malignancy .