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Purple urine bag syndrome: A rare case scenario

Purple urine bag syndrome, i.e., purple discoloration of urine, is a rare and alarming condition in patients with prolonged urinary catheterization. Although it is benign in nature, it signifies possibility of an underlying urinary tract infection. The proposed mechanism for this unusual event is probably a chemical reaction involving tryptophan from food in the gut. We report a case with this unusual and interesting phenomenon in a 72-year-old male.