Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouettes are within normal limits . The bilateral hila are unremarkable . The lungs are clear . There is no pulmonary vascular congestion . There is a right apical pneumothorax measuring approximately 1 .8 cm in largest extent . There is no left pneumothorax . There is no pleural effusion .
    OUTPUT:
    
Small right apical pneumothorax measuring 1 .8 cm in largest extent .