<prompt> What is malignant hydatid disease -Malignant changes into hydatid cystInfection with E. multilocularisHydatid disease in immunocompromised hostCaused by Echino.granulosus  <response>: Echinococcus multilocularis Hydatid disease: Liver is the common organ affected 98 of cases. The disease may resemble a slowly growing carcinomaand may cause symptoms of intrahepatic poal hypeension. Hepatomegaly and hypeension. Cyst appears as solid, film mass with irregular outer layer and has an ability to migrate rapidly to other organs so that it mimics a malignant tumor Man is an accidental intermediate host. Definitive agent- Foxes and wolves and also dogs and cats. Intermediate hosts- Small wild rodents like squirrels, voles, mice, etc. . This disease is found in Russia, Kazakhstan, china etc. 