| Type | Description |
| 0 | Incompatible with life |
| 1 | Commonest (>65%) Several large intercommunicating cysts (up to 10 cm) Mediastinal shift common |
| 2 | 10-15% Smaller than other types Small evenly sized cysts (up to 2 cm) Other associated congenital abnormalities |
| 3 | 8% cases Large solid appearing lesion with microcysts (<5 mm) Causes mediastinal shift Poor prognosis |
| 4 | 10-15% Large cysts, indistinguishable from type 1 |