Skip to main content

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.