Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left chest tube has been removed . There is a small pneumothorax at the left lung apex . Subcutaneous gas at the left chest wall is noted . There is a round soft tissue density located posteriorly at the level of left hilum , concerning for a lobe loculated effusion . This was suggested but not well seen in yesterday 's study . Mild blunting of right costophrenic angle could be small pleural effusion or pleural scarring . Again seen are right clavicle and second rib fracture .
    OUTPUT:
    
1 . Small pneumothorax at the left lung apex . 2 . Possible left posterior loculated effusion . If clinically indicated , CT can be obtained for further characterization .