Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a left apical pneumothorax which is 3 .8 cm in maximal span . There has been marked reduction in the amount of pleural effusion seen in left hemithorax with residual opacity seen in the lingula . Lung is unremarkable . Cardiomediastinal silhouette is stable and within normal limits . The pleural surfaces are unremarkable .
    OUTPUT:
    
Left - sided pneumothorax 3 .8 cm in maximal dimension . These findings were reported to Dr . ___ via phone at 4 :35 p .m . by ___ .