Purple urine bag syndrome:A simple and rare spot diagnosis in Uroscopic rainbow

Purple urine bag syndrome (PUBS) is benign pathology but an alarming symptom to the patients and his/her relatives because of purple discoloration of urine in collecting bag and tubing. Colour of the urine is purple because of tryptophan metabolite named Indigo and Indirubin. In urinary tract infection, sulphatase and phosphatase producing bacteria involved in pathogenesis of PUBS. Here, we discuss a case of 60 year male patient with spinal cord injury with neurogenic bladder presented in surgical emergency with purple colour urine in urobag.