[Hydatid cyst of the Douglas' cul-de-sac with fistula to the bladder. Report of 2 cases].

The present study reported two cases of hydatid cysts localized in Douglas space and that broke in the bladder. The clinical course was characterized by urinary symptoms and by presence the cysts in urine. Abdominopelvic ultrasonography is essential for diagnosis and identification of other sites. When diagnosis is unclear, then CT scan plays a role. Therapy included cystectomy and pericystic resection in one case and intravescical injection of H2O2 in the second case. The course was favorable in both cases.