Normal MAG 3

Case contributed by Dr Ian Bickle

Presentation

Ultrasound appearances suggested a obstructed left kidney, thought to represent a PUJ obstruction.

Patient Data

Age: 45 years
Gender: Female

Symmetrical uptake and excretion of radioisotope from both kidneys.

The relative uptake curves of both kidneys are identical and normal in appearance, with a rapid uptake followed by gradual excretion over 10 minutes.

Case Discussion

Tc-99m MAG3 (mercaptoacetyltriglycine) is one of the technetium radiopharmaceuticals used in renal imaging.  It largely taken up by tubular secretion.   It has a strong role in assessing the function of kidneys and in the assessment of an obstructed kidney.

DMSA is the main competiter radio-isotope renal imaging study, have a large role in the pediatric popuation.

This demonstrates a normal study (for reference) with identical uptake,excretion and curves.

 

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