Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to chest radiograph from 1 day prior , status post left thoracentesis with interval substantial decrease in the effusion which is now small . Tiny left apical pneumothorax . Given for differences in position , right pleural effusion and adjacent atelectasis may have marginally increased . Mild pulmonary vascular congestion . Moderate cardiomegaly . Innumerable sclerotic metastases related to known prostate cancer .
    OUTPUT:
    
Tiny left apical pneumothorax . Substantial decrease and left - sided effusion .