Non-ossifying fibroma: natural history with an emphasis on a stage-related growth, fracture risk and the need for follow-up

Table 3 Duration of any single stage^a (A, B, C and D) in non-ossifying fibroma (NOF) with/without stage-change

	Stage A^a	Stage B^a	Stage C^a	Stage D^a
Lesions without SC (number)	8	18	16	5
Duration (months) mean ± SD	29 ± 16	21 ± 19	14 ± 9	3 ± 2
Lesions with SC (number)	4	15	2	1
Duration (months) mean ± SD	10 ± 4	21 ± 12	29 ± 9	49
Total number of lesions	12	33	18	6
Duration (months) mean ± SD	23 ± 16	21 ± 16	16 ± 11	11 ± 17

ISSN: 1471-2474