Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal lung volumes . There is no focal consolidation , pleural effusion , or pneumothorax . The hilar and mediastinal silhouettes are unremarkable . Heart size is normal . There is no pulmonary edema . There is a 1 .4 x 1 .7 cm ill - defined opacity projecting over the end of the left first rib in the left lung upper zone is best seen on the frontal view . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
A 1 .4 x 1 .7 cm ill - defined opacity projecting over the end of the left first rib . Further assessment with shallow oblique radiographs is recommended to exclude an underlying nodular opacity .