Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate right - sided pigtail catheter in unchanged position . Fluid collection along the right paramediastinum may represent loculated hydropneumothorax , unchanged since prior . The mediastinal silhouette is unchanged . Mild cardiomegaly persists . There is no pulmonary edema . There is no left pleural effusion or pneumothorax .
    OUTPUT:
    
In comparison to study obtained five hours prior , there is no significant change in right paramediastinal fluid collection which may represent loculated hydropneumothorax .