Percutaneous vs surgical management of hepatic cystic echinococcosis: A perspective on evolving clinical pathways

Table 1 Classification of hepatic cystic echinococcosis

WHO classification	Lesion characteristics
CL	Cystic lesion, nature to be determined
CE1	Unilocular cystic lesion, fluid-filled, often with characteristic “double-line sign” or “honeycomb sign”
CE2	Multivesicular, multiseptated cyst with internal daughter cysts
CE3a	Collapsed inner cyst membrane presenting as “water lily sign” or “floating membrane sign”
CE3b	Partially detached inner cyst wall floating freely within the cyst fluid, presenting as “tent sign”
CE4	Solidified lesion presenting as “brain-like sign”
CE5	Solid lesion with calcification

WHO: World Health Organization; CL: Cystic lesion; CE: Cystic echinococcosis.