Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Normal cardiomediastinal and hilar contours . Rounded left upper lobe opacity containing focal lucencies may reflect a fat - containing pulmonary nodule , possibly a hamartoma . Normal pleural surfaces .
    OUTPUT:
    
Rounded left upper lobe opacity concerning for pulmonary nodule . Recommend chest CT for further evaluation . No hilar lymphadenopathy .