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[Long-term course of 6 boys with congenital nephrogenic diabetes insipidus]
Insights
Congenital nephrogenic diabetes insipidus (cNDI) in boys can be effectively treated with hydrochlorothiazide and indomethacin. This combination therapy promotes normal growth and psychointellectual development in affected children.
Area of Science:
- Pediatric Nephrology
- Endocrinology
- Genetics
Background:
- Congenital nephrogenic diabetes insipidus (cNDI) is a rare genetic disorder affecting kidney function.
- Early diagnosis and management are crucial for preventing severe complications like hypernatremia and dehydration.
Observation:
- Six boys diagnosed with cNDI between 3 months and 10 years of age presented with polyuria and hypernatremia.
- Symptoms of cNDI manifested within the first few weeks of life, confirmed by low urinary osmolality and lack of response to vasopressin.
Findings:
- Hydrochlorothiazide monotherapy reduced urinary volume by 26-44%, resolving hypernatremia and enabling normal thriving.
- Addition of indomethacin further decreased urinary volume by 50-60% in cases of increased polyuria.
- The combination of hydrochlorothiazide and indomethacin was well-tolerated and effective in managing cNDI.
Implications:
- Combined hydrochlorothiazide and indomethacin treatment is a necessary and effective strategy for cNDI, particularly in early childhood.
- This therapeutic approach supports normal physical growth and psychointellectual development in children with cNDI.
- Further research into long-term outcomes and optimal dosing strategies for cNDI treatment is warranted.
Abstract:
From 1975-1986 6 boys with congenital nephrogenic diabetes insipidus were diagnosed at the age of 3 months to 10 years. Symptoms appeared within the first few weeks of life. The diagnosis was confirmed by polyuria, low urinary osmolality (97-225 mosm/kg H20), hypernatraemia (max. 171 mmol/l) and the missing response to vasopressin. The treatment was variable; 4 boys received only hydrochlorothiazide (2-2.5 mg/kg/d) which lead to a reduction of the daily urinary volume of 26-44%. Hyperelectrolytaemia disappeared and a normal thriving could be achieved. Later an additional treatment with indomethacin (2 mg/kg/d) was necessary in 3 boys because of an increase of polyuria; there was a further reduction of the daily urinary volume of 50-60%. The combination of hydrochlorothiazide and indomethacin in the treatment of the congenital nephrogenic diabetes insipidus was well tolerated and seems to be--especially during the first few years of life--a necessary and effective treatment which allows a normal thriving and psychointellectual development.