Echinococcosis is a rare disease in central Europe. But with the increasing numbers of foreign citizens, this disease becomes more important in cases of cystic processes of unknown origin. It is still very difficult to achieve a diagnosis and a subsequent therapy, particularly in cases of multiple cysts, means a long lasting process containing certain risks. We report on a 20 years old female patient, suspected to have a severe inflammatory pelvic disease. We found multiple abdominal cysts, not originating from or involving ovaries, tubes, bowel, liver or kidneys. The serologic investigations proved our clinical suspicion on an echinococcosis. But neither serology nor clinical investigations could provide any indication on which kind of echinococcosis we found. We started a therapy with high doses of mebendazole to achieve a shrinkage of the multiple cysts to enable a surgery.