Echinococcosis is a zoonosis transmitted from sheep dogs to humans. It occurs most frequently in sheep and cattle-raising countries, and children who come in contact with sheep dogs are the most likely victims. The liver and the lungs are the most common sites of the hydatid cysts. Their presence in other organs is less common, and primary hydatidosis of the retroperitoneum is extremely rare. In the case reported here, a 65-year-old man had secondary retroperitoneal echinococcosis that recurred three times in 23 years. On the third occasion, marsupialization was performed on a large cyst found in the right retroperitoneum.
Meyer, Eugene and Adar, Raphael
"Echinococcosis of the Spine and Retroperitoneum: Case Report and Review of the Literature,"
Henry Ford Hospital Medical Journal
: Vol. 30
Available at: https://scholarlycommons.henryford.com/hfhmedjournal/vol30/iss1/4