Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient has had prior right middle lobectomy . The previous small right pleural effusion . Has decreased , and is now trace in size . The lungs are clear . There may be a tiny right apical pneumothorax . The heart and mediastinum are within normal limits .
    OUTPUT:
    
Status post right thoracentesis with decreased trace right pleural effusion . Suspected tiny right apical pneumothorax .