Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are low in volume but clear . The heart is moderately enlarged . The mediastinal and hilar contours are unchanged . Oblique foreshortened and posteriorly displaced proximal to mid left humeral shaft fracture is noted .
    OUTPUT:
    
No acute intrathoracic process with oblique left humeral fracture .