Hashimoto's Thyroiditis-Associated Acute Renal Failure and Pitfalls of eGFR Interpretation in Thyroid Diseases.

UNLABELLED: The authors describe a patient with severe hypothyroidism due to Hashimoto's thyroiditis and describe the pitfalls of estimated glomerular filtration rate interpretation in such cases.

LEARNING POINTS: Manifest hypothyroidism can lead to a functional reduction in glomerular filtration rates (GFRs).Restoration of a normal thyroid stimulating hormone (TSH) will also restore kidney function.Cystatin C-based GFR formulas will overestimate renal filtration rates in cases of hypothyroidism and underestimate GFRs in cases of hyperthyroidism.