Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left apical pneumothorax and small left pleural effusion have resolved . Focal left upper pleural thickening is unchanged in comparison to the prior chest radiograph . Nipple shadows bilaterally are not to be confused with pulmonary nodules , however a subtle centimeter wide round opacity at the left lung base , projecting over the posterior tenth rib , could be a pulmonary nodule . Heart size is normal . The mediastinal and hilar contours and pulmonary vasculature are normal .
    OUTPUT:
    
1 . Resolution of left apical pneumothorax and left pleural effusion . 2 . Possible new left lung nodule .