Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the previous exam , there is a new round mass of 3 cm in the anterior segment of the left upper lobe . The rest of the exam is unchanged , with pulmonary hyperinflation and chronic scarring of the apices . There is no pneumothorax and no pleural effusion . The mediastinal and cardiac contour are within normal limits .
    OUTPUT:
    
Since the exam of ___ , there is a new 3 cm lung mass in the left upper lobe : the lesion is concerning for malignancy .