Asian Journal of Research and Reports in Urology

Primary retroperitoneal hydatid cyst is rare. It's developed in retroperitoneal space without accompanied lesions in other organs. We present a rare case of a primary retroperitoneal hydatid cyst treated through surgical means. 55 years old woman living in a rural area, came with left lumbar pain and left lumbar mass. Ultrasonography, and Computed tomography revealed a giant multiloculated r retroperitoneal hydatid cyst.

The cyst occupied all the retroperitoneal space and refuelling kidney and peritoneal viscera, hydatid serology test was highly positive. The other examination did not reveal lesions in the liver, lung, kidney or other organs. We confirmed the diagnosis through left lombotomy. Infected multiloculated hydatid cyst was adherent to psoas muscle ureter and iliac vessels, so we treated it by draining all hydatid fluid and removing hydatid vesicles and partial peri cystectomy.