A Case Report of Fructosamine's Unreliability as a Glycemic Control Assessment Tool in Nephrotic Syndrome.

Fructosamine (FA) is a glycated primary amine widely used as an alternative method for the assessment of glycemic control when glycosylated hemoglobin (HbA1c) measurement is unreliable or if there is a need for short-term glycemic control monitoring. We report a case of a 36-year-old male patient with a six-year history of poorly controlled type 2 diabetes mellitus and nephrotic syndrome. As the nephrotic syndrome progressed, we observed a decline in his serum FA levels that did not correlate with his increased HbA1c due to significant albuminuria. This case report highlights the unreliability of FA in patients with nephrotic syndrome and the significance of other glycemic markers.