Etiological Profile of Nephrocalcinosis in Children from Southern India.

Abstract:

OBJECTIVE:To study the etiological profile and patterns of clinical presentation of nephrocalcinosis. METHODS:In this observational study, patients 18 years or younger, referred to the pediatric nephrology clinic with nephrocalcinosis were evaluated for etiology. Symptoms/signs at presentation, estimated glomerular filtration rate (eGFR) at presentation and follow-up, and growth parameters were recorded. RESULTS:The etiology of nephrocalcinosis (n=54) included distal renal tubular acidosis (n=18; 33.3%), primary hyperoxaluria (n=9; 16.7%), Bartter syndrome (n=7; 13%), Dent disease (n=4; 7.4%), cystinosis, familial hypomagnesemia with hypercalciuria and idiopathic hypercalcemia of infancy (2 each). Idiopathic nephrocalcinosis was seen in 5 (9.3%) children. Clinical features included failure to thrive (53.7%), polyuria (44.4%), bony deformities (31.5%) and hypokalemic paralysis (11.1%). At a median (IQR) follow-up of 24 (8, 56) months, the mean (SD) eGFR had improved from 59 (25.5) to 77 (31.48) mL/min/1.73m2 (P<0.01). Consanguinity was present in 50% (27/54). Genetic analysis in 5 primary hyperoxaluria cases confirmed AGXT mutations in 4; and GRHPR mutation in 1 child. CONCLUSIONS:Distal RTA, primary hyperoxaluria and Bartter syndrome were the common etiologies of nephrocalcinosis in our patient population.

journal_name

Indian Pediatr

journal_title

Indian pediatrics

authors

Ramya K,Krishnamurthy S,Sivamurukan P

subject

Has Abstract

pub_date

2020-05-15 00:00:00

pages

415-419

issue

5

eissn

0019-6061

issn

0974-7559

pii

S097475591600144

journal_volume

57

pub_type

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