Nieto-Vega, Francisco AntonioMartin-Masot, RafaelRodriguez-Azor, BegoñaMartinez-Rivera, VeronicaHerrador-Lopez, MartaNavas-Lopez, Victor Manuel2023-02-092023-02-092020-06-04Nieto-Vega FA, Martín-Masot R, Rodríguez-Azor B, Martínez-Rivera V, Herrador-López M, Navas-López VM. A rare cause of nephrocalcinosis in an infant: Answers. Pediatr Nephrol. 2021 Jan;36(1):79-81. doi: 10.1007/s00467-020-04615-2. Epub 2020 Jun 4. Erratum in: Pediatr Nephrol. 2021 Jan;36(1):213http://hdl.handle.net/10668/15830Hyperoxaluria can be divided into two categories: primary and secondary. Primary hyperoxaluria is the result of an inherited hepatic enzyme deficiency leading to an increased endogenous production of oxalate, and usually exhibits excessively high urine oxalate levels. On the other hand, secondary hyperoxaluria is due to an increased intestinal absorption of oxalate and usually presents with mildly or moderately high urine oxalate levels. Examples of conditions associated with secondary hyperoxaluria are a high-oxalate diet, or conditions associated with fat malabsorption. Given the moderate hyperoxaluria, and the gastrointestinal symptoms referred to in our patient, a secondary cause of hyperoxaluria was suspectedenNephrocalcinosisNephrolithiasisHyperoxaluriaHyperparathyroidismCeliac diseaseMalabsorption syndromeOxalatesHyperoxaluria, PrimaryMalabsorption SyndromesGastrointestinal DiseasesIntestinal Absorptionresearch article32588219Restricted AccessHiperoxaluriaOrinaHiperoxaluria PrimariaDietaAbsorción Intestinal10.1007/s00467-020-04615-21432-198Xhttps://link.springer.com/content/pdf/10.1007/s00467-020-04651-y.pdf