Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are unremarkable . Subtle curvilinear line within the left apex may represent a tiny apical pneumothorax . No right - sided pneumothorax is seen . The lungs are clear without pleural effusion or focal consolidation . There is mild anterior wedging of a mid thoracic vertebral body . The pulmonary vascularity is normal .
    OUTPUT:
    
Possible tiny left apical pneumothorax .