A case report of successful percutaneous aspiration, injection, and re-aspiration (PAIR) technique for treatment of retrovesical pelvic hydatid cyst.

Pelvis is a rare location for occurrence of hydatid cyst with only a few cases reported in the literature. All the previous reports of pelvic hydatid cysts were managed with either surgical exploration and excision or laparoscopic intervention. In this case report, we describe the successful treatment of a large pelvic hydatid cyst located in the retrovesical space using the percutaneous aspiration, injection, and respiration (PAIR) technique. To the best of our knowledge, this is the first successful demonstration of the PAIR technique in the treatment of retrovesical pelvic hydatid cyst. Percutaneous treatment of hydatid cyst in this case yielded desirable reduction in the size of the cyst with subsequent involution and relief of the pressure symptoms on the urinary bladder and obviated the need for a surgical procedure.