Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: If there is a right apical pneumothorax it is very small . Of note , multiple cystic structures seen on recent CT scan at the right lung apex make it difficult to assess for pneumothorax . The cardiomediastinal silhouette and hilar contours are normal . No effusion is identified . 2 x 2 .5 cm mass in the right upper lung is seen in correlates with findings on recent CT scan .
    OUTPUT:
    
Very small right apical pneumothorax .