Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Large left pleural effusion is smaller since the study two hours prior following recent thoracentesis . There is a small left apical pneumothorax . The heart is partially obscured ; however , there is moderate cardiomegaly . Opacities in the right infrahilar region may reflect atelectasis . 2 .4 cm nodular opacity projecting over the ___ anterior interspace may relate to the costochondral junction . The aortic knob is calcified .
    OUTPUT:
    
1 . Moderate left pleural effusion is smaller . 2 . Small left apical pneumothorax is new . 3 . 2 .4 cm left apical nodular opacity may relate to the costochondral junction and can be re-assessed on follow - up chest radiograph . CT should be obtained if the finding persists . These results were telephoned to ___ , MD by ___ , MD at 5 :05 a .m . , ___ , five minutes after discovery .