What would you do?

My first patient today is a pleasant 47 year old guy scheduled for a cholecystectomy (gallbladder removal) - a pretty routine straight forward procedure. His surgeon has ordered a urine test, he had it done 3 days ago. I don't know what the reason was for that test - patient didn't have any symptoms or complains, but when I read the official result, i think about canceling this case until further investigation, it reads: "This horse might be pregnant!" What would you do?