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

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

  Stage Aa Stage Ba Stage Ca Stage Da
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
  1. aStage according to Ritschl [5]. SC stage-change, SD standard deviation