Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A small left apical pneumothorax has minimally increased since the prior study . A 3 .1 cm left upper lobe mass with fiducial markers is worrisome for malignancy . Opacities in the right upper lobe surrounding the fiducial markers , relate to previously treated lung cancer . There are no pleural effusions . Stable mild cardiomegaly and tortuous thoracic aorta are noted .
    OUTPUT:
    
Small left apical pneumothorax , slightly larger since today 's earlier study .