Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . There is a 2 .1 x 1 .9 cm round mass in the left upper lobe . There is right basilar atelectasis . Lungs are otherwise clear . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities . There is minimal wedging of some midthoracic vertebral bodies .
    OUTPUT:
    
2 .1 x 1 .9 cm mass in the left upper lobe , highly concerning for malignancy . Recommend correlation with outside imaging , if available . Alternatively , a CT chest with contrast could be performed for further evaluation . Right basilar atelectasis .