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Table 1 Modified Neer classification of radiological results

From: Minimal invasive surgery for unicameral bone cyst using demineralized bone matrix: a case series

Classification Description
Healed Cyst filled by new bone, with or without small radiolucent area(s) < 1 cm in size
Healing with defects Radiolucent area(s) < 50% of the diameter of bone, with enough cortical thickness to prevent fracture
Persistent cyst Radiolucent area > 50% of diameter of the bone and with a thin cortical rim. No increase in the size of the cyst. Continued restriction of activity or repeated treatment is required
Recurrent cyst Cyst reappeared in a previously obliterated area, or a residual radiolucent area has increased in size