Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to recent radiograph from a few hr earlier , the patient has reportedly undergone a tracheobronchial stent placement . Extensive pneumomediastinum is new , and accompanied by subcutaneous emphysema in the supraclavicular , cervical and chest wall regions . Small bilateral pneumothoraces are also demonstrated . Cardiac silhouette demonstrates left ventricular configuration is accompanied by pulmonary vascular congestion . Asymmetrically distributed heterogeneous opacities in the right mid and lower lobe could reflect asymmetrical edema , aspiration , or hemorrhage in the post procedural setting .
    OUTPUT:
    
Pneumomediastinum and bilateral small pneumothoraces following tracheobronchial stent placement . The findings are concerning for tracheobronchial rupture .