WHO stage | Description | Stage | Size | Preferred treatment | Alternate treatment |
CE1 | Unilocular unechoic cystic lesion with double line sign | Active | <5 cm | Albendazole alone | PAIR |
>5 cm | Albendazole + PAIR | PAIR | |||
CE2 | Multiseptated, "rosette-like" "honeycomb" cyst | Active | Any | Albendazole + either modified catheterization or surgery | Modified catheterization |
CE3a | Cyst with detached membranes (water-lily sign) | Transitional | <5 cm | Albendazole alone | PAIR |
>5 cm | Albendazole + PAIR | PAIR | |||
CE3b | Cyst with daughter cysts in solid matrix | Transitional | Any | Albendazole + either modified catheterization or surgery | Modified catheterization |
CE4 | Cyst with heterogenous hypoechoic/hyperechoic contents; no daughter cysts | Inactive | Any | Observation | - |
CE5 | Solid plus calcified wall | Inactive | Any | Observation | - |
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