Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A 3 .5 cm lung mass in the left lower lobe is present . The cardiac , mediastinal and hilar contours are unremarkable . The right lung is clear . No pleural effusion or pneumothorax is present . A left humeral prosthesis is partially imaged . No acute osseous abnormality is noted .
    OUTPUT:
    
Left lower lobe lung mass highly concerning for malignancy . Dedicated chest CT is recommended for further evaluation .