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Ultrasonography classification of echinococcal cyst.
| WHO IWGE 2001 | Image | Description | Stage |
|---|---|---|---|
| CE1 |  |
Unilocular, anechoic cyst with double line sign | Active |
| CE2 |  |
Multiseptate honey comb cyst | |
| CE3a |  |
Cyst with detached membranes | Transitional |
| CE3b |  |
Cyst with daughter cysts in solid matrix | |
| CE4 |  |
Cyst with heterogenous hypoechoic / hyperechoic contents. No daughter cysts | Inactive |
| CE5 |  |
Solid plus calcified wall |
