[A retroperitoneal hydatid cyst--a rare manifestation of Echinococcus granulosus].

A rare case of a retroperitoneal cyst of Echinococcus granulosus in a male adult is presented. Due to its extension and infiltration of important anatomical structures the hydatid cyst could not be completely removed by operation. Therefore the patient was treated with albendazole for 10 months after surgery. The efficiency of this combined therapy was documented by CT-scan, specific blood tests and histopathological findings.