A 57-year-old man has a routine urinalysis as part of his company's yearly required physical examination. He has a chronic cough (50 pack/year smoking history). His only complaints referable to the urinary tract are some mild dysuria and hesitancy, but he otherwise feels fine. On physical examination there are no abnormal findings.
Questions:
What do these findings suggest?
What further studies are indicated?
What social or environmental history would be important?