Table 2 Modified Neer classification of radiologic results

I

Healed

Cyst filled with new bone, with or without small radiolucent area(s) < 1 cm in size

Not necessary

II

Healed with defects

Radiolucent area(s) < 50% of the diameter of the bone with enough cortical thickness to prevent fracture

Not necessary

III

Persistent cyst

Radiolucent area > 50% of the diameter of the bone and with a thin cortical rim; no increase of the size of the cyst

Continued restriction of activity, possible repeated treatment required

IV*

Recurrent or nonresponsive cyst

Cyst reappeared in a previously obliterated area or a radiolucent area has increased in size

Need for repeated treatment