Table 1 Modified Neer classification system for postoperative radiological evaluation of unicameral bone cysts according to Chang et al
From: Mid- and long-term clinical results of surgical therapy in unicameral bone cysts
Healed | Cyst filled by formation of new bone with or without small static, radiolucent area(s) less than 1 cm in size. |
|---|---|
Healing with defect | Static, radiolucent area(s) less than 50% of the diameter of the bone with enough cortical thickness to prevent fracture. |
Persistent cyst | Radiolucent areas greater than 50% of diameter of the bone and with a thin cortical rim. No increase in cyst size. |
Recurrent cyst | Cyst reappeared in a previously obliterated area or a residual radiolucent area has increased in size. |