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CT scan of a patient with polycystic echinococcosis (from Brazil), treated with albendazole alone. (Top) Pretreatment, rounded, hypoechoid formations in the peritoneum and hepatic parenchyma. (Bottom) Reduction in number and size of vesicles 70 days after the beginning of treatment. (Courtesy of Ulysses G. Meneghelli, Departamento de Clinica Médica, Facultad de Medicina de Ribeirâo Preto, Brazil.)
