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Sonographic appearance of different liver stages of cystic echinococcosis (CE). Inactive stages (CE4 and CE5) are indicated with white arrows (Brunetti E, Kern P, Vuitton DA; Writing Panel for the World Health Organization Informal Working Group on Echinococcosis, 2010. Expert consensus for the diagnosis and treatment of cystic and alveolar echinococcosis in humans. Acta Trop 114: 1–16).
