Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is an opacity at the right lung base , which may represent developing infection . Lungs are otherwise free of focal consolidation . No pleural effusion . There is a 1 .8 cm left apical pneumothorax . No pneumothorax on the right . Cardiomediastinal contours are normal . No acute osseous abnormalities identified . No subdiaphragmatic free air .
    OUTPUT:
    
1 . 1 .8 cm left apical pneumothorax . 2 . Right lung base opacity , may represent developing infection in the appropriate clinical setting .