Frequent and recurrent pathology, bladder stone is a constant complication in enterocystoplasty enlargement. The occurrence of this lithiasis is due to some factors such as urinary tract infections, mucus secretion by the intestine segment moved, poor urinary emptying and foreign bodies (sutures, staples) intra-vesical. Clinical signs are not specific. However the formation of giant lithiases remains exceptional. Some cases have been documented in the literature. The occurrence of this affection must be prevented by dietary measures and regular follow up. New therapies for the control of mucus in the bladder tank have been emerged. Open surgical remains the most common. Today, One port trocar endoscopy enables to handle and extracted lithiases of every size.