His serum creatinine levels were found to be elevated (4.5 mg per deciliter[400 μmol per liter]). Review of his past medical history indicated previous creatinine levels of 1.2 mg per deciliter (110 μmol per liter) in October 2013 and 2.5 mg per deciliter (220 μmol per liter) in February 2014.
His lab results did not detect any proteinuria or hematuria. The urine sediment was remarkable for the presence of abundant calcium oxalatecrystals.
He did not have a personal or family history of kidney stones or other renal ailments. He did not report occasions of ethylene glycol consumption and he had no malabsorptive symptoms. He did not undergo any gastric surgery. The only unusual aspect detected in the history was the regular drinking of 16 8-oz glasses of iced tea. This had not been documented to cause any significant medical problems previously.
The patient’s renal failure worsened rapidly and uremic symptoms were seen. This state of affairs necessitated the initiation of dialysis.
Despite the rapidly progressive nature of the patient’s renal failure, kidney size remained normal on ultrasonography.
A renal biopsy was perfomed.
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