Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Right chest wall port is again seen . There is right - sided volume loss . Peaking of the right hemidiaphragm laterally is new and raises possibility of subpulmonic effusion . Right perihilar and paratracheal opacity presumably due to patient 's known lung cancer is again seen . The left lung is grossly clear . Cardiac silhouette is unchanged .
    OUTPUT:
    
Possible right subpulmonic effusion . Consider a decubitus view . Increased density in the right perihilar region grossly unchanged from prior .