[Cystic cystitis in childhood].

Cystic cystitis is a benign entity highly uncommon throughout childhood and which, from a clinical and radiological point of view, can simulate an intravesical malignant neoplasia (rhabdomyosarcoma); thus an accurate differential diagnosis is required, a biopsy of the lesions being necessary to confirm their nature. The paper presents 2 patients with cystic cystitis discussing the condition's etiology, pathogenesis, signs and symptoms as well as its evolution.