Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since clamp trial , small right apical pneumothorax is stable in size . Minimal right effusion is new . The lungs are mostly clear . There is no pneumothorax on the left . The cardiomediastinal silhouette is unchanged . Right apical chest tube is unchanged in position .
    OUTPUT:
    
Stable small right apical pneumothorax .