Comments on the article of Cristiana Franchi et al. in the August 1999 issue of 'Clinical Infectious Diseases' on their findings in the long-term follow-up of patients with hydatidosis after treatment with albendazole or mebendazole. Characteristic of cystic echinococcosis; Side effects during chemotherapy; Third option for the treatment of hydatid cysts in the liver of other locations.