Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a 1 .5 cm nodule projecting over the right lung base . The lungs are well expanded and otherwise clear . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process . A 1 .5 cm nodular density projecting over the right lung base . This could represent a nipple shadow however underlying pulmonary nodule is possible .