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Rare case of Pseudohypercreatininemia after surgery for aortic dissection: A report

Niveditha SubramaniWritten by Niveditha Subramani Published On 2023-08-30T20:00:15+05:30  |  Updated On 30 Aug 2023 2:30 PM GMT
Rare case of Pseudohypercreatininemia after surgery for aortic dissection: A report
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Creatinine levels are considered to be the gold standard to define kidney functioning in patients. Elevated creatinine concentrations often indicate acute renal injury and renal biopsies are most preferred diagnostic methods in this situation. Creatinine may be measured using the Jaffe method and enzymatic methods. The latter has high specificity and is used by many...

Creatinine levels are considered to be the gold standard to define kidney functioning in patients. Elevated creatinine concentrations often indicate acute renal injury and renal biopsies are most preferred diagnostic methods in this situation. Creatinine may be measured using the Jaffe method and enzymatic methods. The latter has high specificity and is used by many medical institutions

Paraproteins can interfere in the determination of various clinically important analytes in an unpredictable manner affecting different methodologies. Interferences of mild to moderate degree have been reported affecting the measurement of serum creatinine. Pseudohypercreatininemia caused by immunoglobulin (Ig)M which can be misleading, but there are no reports of pseudohypercreatininemia.

A case study in BMC Nephrology reports a rare case of a women with falsely elevated creatinine concentration with the presence of abnormal proteins, pseudohypercreatininemia should be considered as a differential diagnosis and prevent invasive procedures in the patients.

A 54-year-old woman underwent surgery for descending aortic dissection. At admission, she had developed another aortic dissection in the descending aorta and underwent graft replacement. She had multiple aortic dissections at a young age, but had no findings or family history of Marfan syndrome or Ehlers–Danlos syndrome. Because of severe intraoperative bleeding, she was transfused with 10 units of red blood cells, 4 units of fresh-frozen plasma, and 10 units of platelets, and her creatinine concentration was approximately 1 mg/dl. Nine days postoperatively, her creatinine concentration increased from 1 mg/dl to 5.78 mg/dl. Azotemia and hyperkalemia were absent and physical examination findings were unremarkable.

The case study found that

• Cystatin C concentration was 1.56 mg/l (normal range, 0.56–0.8 mg/l) and pseudohypercreatininemia was suspected.

• Testing with different reagents showed a creatinine concentration of 0.84 mg/dl. Immunoglobulin (Ig)G was markedly elevated, and creatinine and IgG fluctuated in parallel, suggesting the cause of the pseudohypercreatininemia.

• IgG4 was also elevated at 844 mg/dl. Immunosuppressive steroid therapy effectively decreased the IgG concentration and resolved the pseudohypercreatininemia.

Researchers concluded that “In cases of elevated creatinine concentration with the presence of abnormal proteins, pseudohypercreatininemia should be considered. We report a rare case of pseudohypercreatininemia caused by polyclonal IgG.”

Reference: Tasaki, A., Fukuda, M., Ikeda, Y. et al. Pseudohypercreatininemia after surgery for aortic dissection: a case report. BMC Nephrol 24, 220 (2023). https://doi.org/10.1186/s12882-023-03275-2

PseudohypercreatininemiaAortic Dissesection SurgeryCreatinine levelsAcute Kidney InjuryAcute Renal Injury and Renal biopsiesImmunoglobulin (Ig)MBMC Nephrology.
Source : BMC Nephrology
Niveditha Subramani
Niveditha Subramani

    MSc. Neuroscience

    Niveditha Subramani a MSc. Neuroscience (Faculty of Medicine) graduate from University of Madras, Chennai. Ambitious in Neuro research having worked in motor diseases and neuron apoptosis is interested in more of new upcoming research and their advancement in field of medicine. She has an engrossed skill towards writing and her roles at Medical dialogue include Sr. Content writer. Her news covers new discoveries and updates in field of medicine. She can be reached at editorial@medicaldialogues.in

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