The color of urine in patients who receive anesthetic gives much medical 
information to a medical team. So, we must check the urine color and know the 
cause of discoloration of the urine from anesthetic patients. Green urine is 
rare indeed and it is a benign potential side effect of propofol; this 
phenomenon is related to the metabolism of propofol. We experienced green urine 
from a long-term anesthetized patient who received a continuous infusion of 
propofol. We report here on this unusual case and we review the relevant 
literature.