Abstract
Cystitis cystica associated with Ureterits cystica is rare condition although it's benign; can be misdiagnosed with malignant tumor. In this report, we present this case of a patient who presented with right flank pain. CT scan showed bilateral hydroureteronephrosis. During the cystoscopy and bilateral ureteroscopy, multiple polypoidal like lesion in the bladder and along both ureters was found. The pathology report described a cystic structure lined by cuboidal epithelial cells layer consist with cystitis cystica and ureteritis cystica. In this condition no active treatment is required.