Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Asymmetric density of the lung bases is related to right - sided mastectomy . Apparent nodular density in the right lower lung is likely caused by A BENIGN CALCIFICATION IN LUNG OR RIB , OR VESSEL , EITHER ON END OR CROSSING . There is no focal consolidation , pleural effusion , pulmonary edema , or pneumothorax . The cardiomediastinal contour is normal . The osseous structures and upper abdomen are unremarkable .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . SMALL BENIGN CALCIFICATION OR VESSEL SHOULD NOT BE MISTAKEN FOR A CLINICALLY SIGNIFICANT RIGHT LUNG NODULE .