Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP erect portable view of the chest was obtained . There has been interval placement of a left - sided chest tube which appears to terminate approximately at the level of the medial left diaphragm and may extend to the mediastinum . There has been re-expansion of the left lung with opacity in the left mid - to - lower lung which could be due to pulmonary hemorrhage / contusion , partial collapse , or less likely infection . Subcutaneous emphysema is seen along the left chest wall .
    OUTPUT:
    
Interval placement of left chest tube with reexpansion of the left lung , with opacity / consolidation in the left mid - to - lower lung fields with shift of the mediastinum to the left may be due to partial lung collapse , although underlying pulmonary contusion / hemorrhage is may be present . The left chest tube appears to extend to the level of the medial left diaphragm and may encroach upon the mediastinum . Left chest wall subcutaneous emphysema .