Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates small to moderate right - sided pleural effusion with adjacent compressive atelectasis , which has increased over the interval . The left lung is essentially clear . There is a probable tiny right apical pneumothorax . The cardiomediastinal and hilar contours are unchanged .
    OUTPUT:
    
1 . Small to moderate right - sided pleural effusion with adjacent compressive atelectasis , which has increased over the interval . 2 . Probable tiny right apical pneumothorax .