Congenital nephrogenic diabetes insipidits is a rare tubulopathy, characterized by resistance of the kidney to the antidiuretic hormone arginine vasopressin (AVP), resulting in polyuria and polydipsia. In literature, more patterns of inheritance have been described. The X-linked recessive form is the most frequent and it is caused by mutations in the gene encoding for the vasopressin V2 receptor (AVPR2). Objective Objective of our retrospective study was to evaluate clinical and auxological data in patients with NDI X-linked, confirmed by identiflcalion ofAVPR2 mutations. Results AVPR2 mutations have been found in 19 patients out of 23 considered. At the time of diagnosis the median age was 9 months; the main related symptoms were polyuria, pyressia and failure to thrive. These patients have been subjected to a pharmacological therapy and a diet with moderate salt restriction and, after a mean follow-up of 8 years, a significant improvement of the growth was demonstrated (p <0,05). The following mean changes of growth data (expressed as standard deviation scores), have been observed, comparing the data at time of diagnosis with the last follow-up control: weight from - 2,48 to - 0,4 (p = 0,002), height from - 1,76 to - 0,72 (p = 0,072;, weight for height from - 2,18 to 0,7 (p = 0,022). Conclusions The results showed that a significant recovery of growth in patients with molecolar diagnosis of X-linked NDI, may be obtained.
|Translated title of the contribution||Clinical and auxological evaluation in patients with molecular diagnosis of X-linked nephrogenic diabetes insipidus|
|Number of pages||7|
|Journal||Rivista Italiana di Pediatria|
|Publication status||Published - 2000|
ASJC Scopus subject areas
- Pediatrics, Perinatology, and Child Health