Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval placement of a left - sided pigtail catheter , which appears coiled overlying the left lower lobe . A left side hydropneumothorax with adjacent atelectasis has decreased in size , now moderate . The upper left lung and right lung are grossly clear . There is no evidence of large pneumothorax . The cardiomediastinal silhouette is incompletely visualized secondary to the pleural effusion , but appears grossly unchanged from the prior examination . Asymmetric opacity overlying the first costochondral joint , may be degenerative versus overlying lung nodule .
    OUTPUT:
    
1 . Placement of a pigtail catheter in the lower left hemi thorax with interval decrease in size of a now moderate left hydropneumothorax . 2 . Opacity overlying left first costochondral joint may represent asymmetric degenerative changes versus pulmonary nodule . Recommend CT chest for further evaluation .