Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Over the prior few radiographs there has been improvement in the left pleural effusion , now small . Small left apical pneumothorax is noted . The left perihilar mass better seen on recent CT obscures the majority of the left lung . Multiple nodules in the right lung are also seen , better evaluated on the prior CT . The right lung is clear with no pleural effusion .
    OUTPUT:
    
Small left pleural effusion , improved since the last radiograph . Small left pneumothorax . Otherwise similar appearance of multifocal metastatic disease .