Primary hyperoxaluria type 1 in The Netherlands: prevalence and outcome

Although more than one-half of the PH1 patients have symptoms under the age of 10 years, PH1 can present at any age. In adults, PH1 presents predominantly with ESRD, which may be due to misinterpretation of early symptoms. Although nephrocalcinosis is correlated with development of renal insufficiency, the latter can occur even in the absence of nephrocalcinosis. Pyridoxine sensitivity is associated with better outcome in PH1.