title: Malabsorption syndrome as a rare cause of nephrocalcinosis.
abstract: Nephrocalcinosis is characterized by calcification of kidney parenchyma and can be caused by an increased amount of calcium, phosphate or oxalate in urinary excretion. We report a 35-year-old female with nephrocalcinosis. She had fitful steatorrhea since last year. Physical examination was normal. Analytic exams found normal renal function and ionogram. Primary hyperparathyroidism, renal tubular acidosis and sarcoidosis were excluded. Urinalysis showed mild hematuria, without proteinuria and 24-hour urine collection exhibited hyperoxaluria. Patient was submitted to an endoscopy and duodenal biopsy whose histology sustained the diagnosis of celiac disease. Fluid intake increase and gluten and oxalate free diet were initiated.
authors.affiliation: Department of Nephrology, Centro Hospitalar Trás-os-Montes e Alto Douro, Vila Real, Portugal.
authors.forename: Rui
authors.initials: R
authors.lastname: Abreu
authors.affiliation: Department of Nephrology, Centro Hospitalar Trás-os-Montes e Alto Douro, Vila Real, Portugal.
authors.forename: Cláudia
authors.initials: C
authors.lastname: Bento
authors.affiliation: Department of Nephrology, Centro Hospitalar Trás-os-Montes e Alto Douro, Vila Real, Portugal.
authors.forename: Luís
authors.initials: L
authors.lastname: Oliveira
authors.affiliation: Department of Nephrology, Centro Hospitalar Trás-os-Montes e Alto Douro, Vila Real, Portugal.
authors.forename: Teresa
authors.initials: T
authors.lastname: Morgado
keywords: celiac disease; hyperoxaluria; malabsorption syndrome; nephrocalcinosis