A rare cause of nephrocalcinosis in an infant: Answers.

Abstract

Hyperoxaluria 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 suspected