Related Experiment Video
Updated: Jun 1, 2026

CRISPR-Cas-mediated Multianalyte Synthetic Urine Biomarker Test for Portable Diagnostics
Published on: December 8, 2023
Purple urine bag syndrome: case report and literature review
K-H Kang1, K-H Jeong, S-K Baik
1Department of Internal Medicine, College of Medicine, Kyung Hee University, Dongdaemun-gu, Seoul, Republic of Korea.
Abstract:
Purple urine bag syndrome (PUBS) is a medical syndrome in which there is purple discoloration of the urine of catheterized patients as well as discoloration of the collecting bag and the associated tubing. This rare condition, which mostly affects women, is generally associated with catheter-associated urinary tract infection, chronic constipation and alkaline urine. PUBS may be caused by sequential chemical reactions involving tryptophan from food in the gastrointestinal tract. The clinical course of PUBS is generally benign, and intensive treatment is not usually needed. We present 3 cases of this unusual and interesting phenomenon and a literature review.
Related Concept Videos
Acute Pyelonephritis II: Diagnostic Studies and Management
Urine Studies I: Urinalysis
Nephrotic Syndrome II : Assessment and Medical Management
Imaging Studies V: Intravenous Urography and Retrograde Pyelography
Jaundice
Nephrotic Syndrome I : Introduction
