Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi upright radiograph of the chest demonstrates low lung volumes resulting in bronchovascular crowding . The previously described left apical pneumothorax is not definitely identified . Air outlining the left pectoral muscle is unchanged . A left - sided PleurX catheter is present . There are small bilateral pleural effusions with adjacent atelectasis , which have decreased over the interval . Indistinctness of pulmonary vessels is consistent with elevated pulmonary venous pressure .
    OUTPUT:
    
The previously described left apical pneumothorax is not definitely identified .