CT-guided radiofrequency ablation of osteoid osteoma in the long bones of the lower extremity

Table 1 Patient characteristics and treatment course

No.	Age (yr)	Sex	Location	Size (mm)	Duration of pain (mo)	No. of tip position in the first ablation	First clinical success	Pre RFA		Post RFA		Recurrence	Second clinical success
								VAS	NSAIDs	VAS	NSAIDs
1	18	M	Femur	4	9	1	Yes	2	Yes	0	No	No	N/A
2	17	M	Fibula	7	14	1	Yes	1	Yes	0	No	No	N/A
3	17	F	Femur	11	6	2	No	10	Yes	0	Yes	2 mo later	No
4	17	M	Femur	11	15	3	Yes	5	Yes	1	No	No	N/A
5	8	M	Femur	14	11	1	No	8	Yes	2	No	4 mo later	Yes
6	7	F	Femur	6	7	1	Yes	9	Yes	0	No	No	N/A
7	4	M	Femur	9	6	1	Yes	N/A	Yes	N/A	No	No	N/A
8	15	F	Tibia	8	5	1	Yes	6	Yes	2	No	No	N/A

VAS: Visual analogue scale; NSAIDS: Non-steroidal anti-inflammatory drugs; N/A: Not applicable.