False appearance of urinary stasis on Tc-99m MAG3 renal scan secondary to vicarious tracer concentration in the gallbladder

Mark Tulchinsky, D. F. Eggli

Research output: Contribution to journalArticle

2 Scopus citations


Tc-99m MAG3 is a tubular agent that is widely used for assessment of postrenal obstruction. However, this tracer has a variable amount of hepatobiliary excretion. This can render different patterns of gastrointestinal tracer distribution that can sometimes simulate renal or urinary tract pathology. This report presents a case where tracer accumulation in the gallbladder simulated urinary stasis in the upper pole calyces of the right kidney. Erroneous diagnoses can be avoided by obtaining additional images in anterior and right lateral projections.

Original languageEnglish (US)
Pages (from-to)836-838
Number of pages3
JournalClinical Nuclear Medicine
Issue number9
Publication statusPublished - Jan 1 1995


All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging

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