Q: What do the “BUN” and “creatinine” lab tests mean? A: BUN stands for “Blood Urea Nitrogen,” and represents a breakdown product of protein digestion. Protein is digested into amino acids. Amino ...

Credit: Getty Images This month’s case involves 2 clinicians who assumed that if blood work had been normal in the past, it would remain normal. A truism about life is that you must always expect the ...