Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to the previous examination , there is a stable 1 cm right apical pneumothorax . No evidence of tension is seen . Redemonstrated are stable atelectatic changes of the right lung base . The left lung is essentially clear without focal consolidation , pleural effusion , pneumothorax , or pulmonary edema identified . The cardiomediastinal silhouette is mildly enlarged and stable .
    OUTPUT:
    
Unchanged , 1 cm right apical pneumothorax without evidence of tension .