From the case:
Hydatid disease of the liver (illustrations)
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Staging of cystic ecchinococcosis (CE)
CE1: unilocular, simple cysts with liquid content
CE2: multivesicular, multiseptated cysts
CE3a: cysts with liquid content and specific detached endocyst
CE3b: unilocular cysts with daughter cysts inside a mucinous or solid cyst matrix
CE4: heterogenous solid cysts with degenerative content
CE5: cysts with degenerative content and heavily calcified wall.