Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are remarkable for stable asymmetry of the hilar contours , left greater than right , corresponding to asymmetrical pulmonary vasculature on prior CT of ___ . . Lungs are clear . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
No conventional radiographic evidence of intrathoracic metastatic disease . .