Table 1 Modified Neer classification
From: Treatment of aneurysmal bone cysts using endoscopic curettage
Classification | Description | Details |
|---|---|---|
A | Healed | Cyst filled with new bone with small radiolucent area (< 1 cm) |
B | Healed with a defect | Radiolucent area (< 50% diameter) with enough cortical thickness |
C | Persistent cyst | Radiolucent area (≧50% diameter) with thin cortical rim |
D | Recurrent cyst | Cyst reappearing in the obliterated area or in the increased residual radiolucent area |