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Always look beyond the stones: hyperoxaluria overlooked
T T Chung1, S Summers, M Sheaff
1Department of Renal Medicine and Transplantation, The Royal London Hospital, London, UK. Tengx2@hotmail.com
Clinical Nephrology
|July 23, 2004
Summary
Late diagnosis of hyperoxaluria led to severe kidney damage in a young woman. Early metabolic screening, including urine oxalate levels, is crucial for all patients with kidney stones.
Area of Science:
- Nephrology
- Medical Genetics
- Biochemistry
Background:
- Primary hyperoxaluria type I is a rare genetic disorder.
- It leads to excessive oxalate production and deposition in the kidneys.
- Delayed diagnosis can result in irreversible kidney damage.
Observation:
- A 24-year-old woman presented with nephrocalcinosis, staghorn calculus, and recurrent UTIs.
- Initial management focused on stone removal, neglecting metabolic workup.
- Hyperoxaluria was diagnosed late, evidenced by elevated urine oxalate and renal biopsy findings.
Findings:
- The patient was diagnosed with hyperoxaluria type I.
- Significant renal function reduction was noted at the time of diagnosis.
- Despite treatment with pyridoxine and crystallization inhibitors, renal function declined, necessitating hemodialysis.
Implications:
- This case highlights the critical importance of early metabolic screening for hyperoxaluria in patients with kidney stones.
- Timely diagnosis and intervention can potentially prevent severe renal dysfunction and the need for transplantation.
- Clinical suspicion for primary hyperoxaluria type I should be raised in young patients with severe nephrolithiasis or a family history.