Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is difficult to discern given the presence of left basilar opacity which likely reflects a combination of small left pleural effusion with atelectasis or infection . The heart size is slightly increased , now appearing moderately enlarged . The aorta remains mildly tortuous . The pulmonary vascularity is not engorged . No right - sided pleural effusion is seen , and there is no pneumothorax . An osseous excrescence off of the left humeral head may be posttraumatic in etiology . There are no acute osseous abnormalities otherwise demonstrated .
    OUTPUT:
    
Left basilar opacity likely reflects a combination of small left pleural effusion and left basilar atelectasis or infection . Heart size is difficult to discern but appears increased in size compared to the prior , now moderately enlarged .