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Familial hypomagnesaemia--hypercalciuria leading to end-stage renal failure
J C Nicholson1, C L Jones, H R Powell
1Department of Nephrology, Royal Children's Hospital, Parkville, Victoria, Australia.
Insights
Hereditary renal magnesium wasting causes end-stage renal failure in children. Kidney transplants from heterozygous parents are successful, preventing syndrome recurrence in these hypomagnesaemia cases.
Area of Science:
- Nephrology
- Medical Genetics
Background:
- Hereditary renal hypomagnesemia encompasses several genetic disorders.
- These conditions are characterized by renal magnesium wasting, leading to potential kidney damage.
Observation:
- Two sisters from a consanguineous marriage presented with renal magnesium wasting, hypercalciuria, and nephrocalcinosis.
- Pathological examination of heterozygous parental kidneys showed mild focal interstitial fibrosis.
Findings:
- This syndrome represents a novel cause of end-stage renal failure in pediatric patients.
- Successful kidney transplantation from heterozygous parental donors was achieved.
Implications:
- Transplantation from heterozygous donors appears safe and effective, without recurrence of the hypomagnesaemia syndrome.
- Highlights the importance of genetic counseling and early diagnosis in families with hereditary renal disorders.
Abstract:
Several disorders of hypomagnesaemia of hetary renal origin are now recognised. The cases of two sisters from a consanguineous marriage with the syndrome of renal magnesium wasting, hypercalciuria and nephrocalcinosis are presented. Pathological examination of the heterozygous parental kidneys revealed mild focal interstitial fibrosis. This condition is a previously unreported cause of end-stage renal failure in childhood, and this report suggests that transplantation from heterozygous parental donors can be successfully undertaken without recurrence of the syndrome.