Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No focal consolidations . No pulmonary edema . Mild enlargement of the cardiomediastinal silhouette , which may be projectional . Small right pleural effusion . No pneumothorax . Sclerotic lesion within the left humeral head likely represents a large bone island . Atherosclerotic calcification is noted of the aortic knob and descending aorta .
    OUTPUT:
    
Small right pleural effusion . Otherwise , no acute intrathoracic abnormality .