Echinococcosis is parasite disease quite spread out in our country. It is known that Dalmatia and then Montenegro are the most infected areas in Yugoslavia. Echinococcus disease is not only disease of the organ attacked but one whose repercussions very often give poly-organic character in clinical, morphological and therapeutic sense. Due to a great number of infected dogs still existing insufficient number of hygienic slaughterhouses, slaughtering livestock without veterinary control, ignorance, lack of education as well as not enough prophylactic measures conducted, this disease represents an outstanding problem. In respect of identification of this disease number of cysts, location complications arising as well as operative approach, so far diagnostic methods are enriched by introducing electronic diagnostic methods (scintigraphy, US and CT). Numerous operating methods aimed to removal of parasite, elimination of irreversible sequelae and achievement of anatomo-physiological restitution of the organ in which the diseased are applied.