Hypercalciuria preceding IgA nephropathy in a child with haematuria

We describe a child with isolated haematuria who was diagnosed and successf ully treated for idiopathic hypercalciuria for 6 months, after which IgA ne phropathy was demonstrated on renal biopsy performed due to the relapse of haematuria in spite of low calciuria levels. To our knowledge, this is the first case evaluated systematically in the literature shown to have IgA nep hropathy while being followed up for idiopathic hypercalciuria.