Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal upright view of the chest demonstrates a small right apical pneumothorax , which is not significantly changed since study obtained one hour prior . Right pleural catheter is in place with the tip projecting to the right of the T12 vertebral body . The patient 's known right upper lung mass is again noted . Diffuse right lung opacities are also unchanged . Left lung remains essentially clear . There is no left pneumothorax or pleural effusion . Hilar and mediastinal silhouettes are unchanged . Heart size is top normal .
    OUTPUT:
    
In comparison to study obtained one hour prior , there is no significant interval change in small right apical pneumothorax .