Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a small right apical pneumothorax , which is decreased from the prior study of ___ . Note is made of a right - sided chest tube . The mediastinal silhouette is normal . There is no effusion or pulmonary vascular congestion . There is increased sclerosis of the visualized thoracic vertebral bodies , for which correlation with a metabolic process or possible metastatic malignancy is recommended .
    OUTPUT:
    
1 . Interval decrease in size of small right apical pneumothorax . 2 . Increased sclerosis of the thoracic vertebral bodies , correlate with metabolic process or possibly metastatic malignancy .