Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded . A 15 mm well - circumscribed nodular density is noted in the left lower lobe . The cardiomediastinal silhouette is unremarkable . There is no pleural effusion , pneumothorax , focal consolidation , or pulmonary edema . Mild aortic arch calcifications are present . Multilevel degenerative changes are present throughout the thoracic spine , with disc space narrowing and anterior flowing osteophytes contiguous over multiple levels , compatible with diffuse idiopathic skeletal hyperostosis ( DISH ) .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Well - circumscribed nodular density in the left lower lobe may represent a granuloma . Correlation with prior imaging is recommended to ensure stability . If no prior imaging is available for comparison , low kilovoltage oblique radiographs could be obtained to document uniform calcification , diagnostic of a benign nodule .