TY - JOUR T1 - Longitudinal study of kidney water management in patients diagnosed with idiopathic hypercalciuria in childhood JO - Nefrología (English Edition) T2 - AU - Pérez Suárez,Germán AU - Serrano,Alma AU - Magallanes,María Victoria AU - Arango Sancho,Pedro AU - Luis Yanes,María Isabel AU - García Nieto,Víctor M. SN - 20132514 M3 - 10.1016/j.nefroe.2020.03.011 DO - 10.1016/j.nefroe.2020.03.011 UR - https://www.revistanefrologia.com/en-longitudinal-study-kidney-water-management-articulo-S2013251420300420 AB - IntroductionThere is much debate about whether idiopathic hypercalciuria (IH) affects kidney water management. For the first time in the literature, we carried out a longitudinal study of kidney water management (KWM) in patients diagnosed with IH in childhood and followed-up until adulthood (mean follow-up 17.7±1.4 years). MethodsTwenty-nine patients (7 M, 22 F) over the age of 24 years (mean 28.2±2.9 years, range: 24.1–35.9) who were diagnosed with IH in childhood (mean 7.6±3.2 years, range: 1–14) were included. Maximum urine osmolality (UO) and/or urine volume adjusted for 100ml of glomerular filtration rate (V/GFR) in both age groups (pediatric and adult) were determined. Moreover, whenever possible, in both age groups plasma creatinine levels, plasma sodium levels, uric acid levels, the citrate/creatinine ratio and the calcium/citrate ratio were recorded and a renal and bladder ultrasound was performed. ResultsIn the pediatric age group, KWM was altered in 9/29 cases (31%) (4 with reduced maximum UO and 5 with elevated V/GFR). In adulthood, KWM was found to be affected in 7/29 cases (24.1%) (6 with reduced UO and one with elevated V/GFR). Compared to the pediatric age group, adult patients had lower V/GFR, calcium/creatinine and citrate/creatinine values, as well as higher plasma creatinine, uric acid and calcium/citrate. There were no differences in the maximum UO in both age groups. However, UO in adulthood was significantly lower in subjects who had renal colic compared to those who did not (p=.04). ConclusionsKWM was affected in approximately one third of patients with IH, which persisted 20 years after diagnosis. We think that these results may be due to adherence to the recommended protective diet and to the pharmacological treatment administered at the diagnosis of IH during childhood. ER -