Urinary excretion of calcium, phosphate, magnesium, and uric acid in healthy infants and young children. Influence of feeding practices in early infancy.

Background: Reference values for urinary calcium (Ca) and other solutes/creatinine (Cr) ratios in infants and young children are scarce. Its variation with type of lactation administered, breastfed (BF) or formula (F), is incompletely known.

Methods: A total of 511 spot urine samples from 136 children, aged 6 days to < 5 years, was collected.

[Not Available].

Hereditary renal hypouricemia is a rare autosomal recessive genetic disorder that involves an isolated defect in uric acid reabsorption at the renal tubules. Patients present with serum uric acid concentrations of less than 2mg/dl (119 micromol/L) with increased fractional excretion above 10%. Most of the patients are asymptomatic and are detected incidentally.

Predictive factors for kidney damage in febrile urinary tract infection. Usefulness of procalcitonin.

Objective: To establish the utility of procalcitonin (PCT) and other clinical and analytical parameters as markers of acute and permanent renal damage in children after a first febrile urinary tract infection (UTI).

Methods: Retrospective multicentre study. Statistical study: descriptive, receiver operating characteristic (ROC) curves and multiple logistic regression.