Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to prior examination , there has been increase in subcutaneous gas tracking along the right hemithorax and now extending to the neck . There is also unusually sharp demarcation of the right heart border with a thin rim of lucency near the cardiophrenic angle which may suggest a medial component of pneumothorax . These findings in conjunction are worrisome for a left chest tube . There is otherwise no change with persistent low lung volumes with associated atelectasis and mild vascular congestion .
    OUTPUT:
    
Increase in amount of subcutaneous gas in the right hemithorax as well as the lucency along the right heart border suggesting a medial component of pneumothorax . These findings are suggestive of a suboptimally functioning chest tube . Results were discussed over the telephone with Dr . ___ by Dr . ___ at 11 : 56 on ___ at time of initial review .