Abnormal MAG3 renal scintigraphy resulting from dehydration.
Routine Tc-99m mercaptoacetyltriglycine (MAG3) renal scintigraphy in a 64-year-old quadriplegic woman revealed normal blood flow with abnormal, continual parenchymal uptake and minimal excretion into the pelvocaliceal collecting systems and urinary bladder. Because there was no clinical reason to suspect acute tubular necrosis, renal artery stenosis, or ureteropelvic junction (UPJ) obstruction, relative dehydration was considered likely. A repeat MAG3 renal scan 6 days later using intravenous fluids to ensure adequate hydration was completely normal. This case highlights the importance of patient preparation to include adequate hydration.
Achong
Dwight M
DM
Nuclear Medicine Service, James A. Haley Veterans Hospital, Tampa, FL 33612-4745, USA. dwight.achong@med.va.gov
Tenorio
Luis E
LE
D003681:Dehydration / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D007674:Kidney Diseases / Q000000981:diagnostic imaging*; D008875:Middle Aged; D011786:Quality Control; D011866:Radioisotope Renography / Q000379:methods*; D019275:Radiopharmaceuticals; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D017263:Technetium Tc 99m Mertiatide
D019275:Radiopharmaceuticals; D017263:Technetium Tc 99m Mertiatide