Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left pigtail chest tube tip projects over the left upper lung field . Previously seen left apical pneumothorax is not clearly visualized on the current exam . There does appear to be a small air - fluid level posteriorly on the left which could reflect a small loculated hydropneumothorax . Re - demonstrated is subcutaneous emphysema within the left neck and chest wall . Left basilar patchy opacity likely reflects atelectasis . Minimal atelectasis is also noted in the right lung base . The cardiac , mediastinal and hilar contours are unchanged , and no pulmonary edema is demonstrated .
    OUTPUT:
    
Previously noted left apical pneumothorax is not clearly visualized on the current exam , though there does appear to be a small loculated hydropneumothorax posteriorly on the left . Left basilar atelectasis .