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

Table 1 Clinical Data of non-ossifying fibromas including age at detection, size in length, expansion in the transversal and sagittal diameter

	Stage A^a	Stage B^a	Stage C^a	Stage D^a
Number of patients	19	53	17	14
Average age (years)	13 ± 3.7	15 ± 5.7	20.4 ± 7.7	40.1 ± 12.4
Average length (mm)	21 ± 11	38 ± 16	47 ± 29	34.6 ± 15
Average transversal diameter expansion (%)	20 ± 9	46 ± 22	39 ± 12	30 ± 10
Average sagittal diameter expansion (%)	39 ± 14	56 ± 25	39 ± 12	32 ± 10

^aStage according to Ritschl [5]. Data provide average value and standard deviation

ISSN: 1471-2474