[Hereditary hyperoxaluria or oxalosis. Apropos of a case]

We report a case of primary oxalosis in a 12-year old girl. This unusual observation exemplifies two diagnostic pitfalls, i.e. false urinary tract infections and technical difficulties in accurately measuring oxalate urinary excretion. On the basis of this case and a review of the literature, we discuss diagnostic and therapeutic methods. Early diagnosis of the disease is important in order to monitor the patient and provide genetic counseling.