Common to rare causes of urine discoloration

Pseudomonas aeruginosa infection of the urinary tract results in green urine due to the release of the pigment pyocyanin. Green and blue urine may also appear in chronic obstructive jaundice due to biliverdin excretion, an oxidation product of bilirubin.

Multiple case reports describe green urine in patients with propofol infusion syndrome, a theoretically fatal disorder characterized by renal and cardiac failure, severe metabolic acidosis, and rhabdomyolysis, particularly in patients with cerebral injury receiving prolonged high dose propofol infusions.