Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left chest pigtail catheter been removed . There is a small left apical pneumothorax , which has decreased in size when compared to prior studies . There is no evidence of focal consolidation , pleural effusion , or frank pulmonary edema . The cardiomediastinal silhouette is within normal limits . There is mild dextroscoliosis of the thoracic spine .
    OUTPUT:
    
1 . Small left apical pneumothorax , decreased in size post pigtail catheter removal .