Table 1.

Patients' data.

N	Age (years) ∗	Gender	Tumor location	Type	Surgical guide (PSI)	Presence of metastases	Evolution
1	11	M	Femur	OS	Yes	No	NED
2	11	F	Pelvis	EwS	Yes	No	NED
3	21	F	Femur	FD	Yes	No	NED
4	9	F	Radius	OS	Yes	No	NED
5	7	F	Radius	EwS	Yes	No	NED
6	6	F	Femur	EwS	No	No	NED
7	12	M	Femur	OS	No	Yes	Deceased
8	9	M	Femur	OS	No	No	NED
9	11	M	Femur	OS	No	No	NED
10	36	M	Ulna	EwS	No	Yes	Deceased
11	14	M	Pelvis	EwS	Yes	No	Deceased
12	17	M	Fibula	EwS	Yes	Yes	Deceased

M: male; F: female; NED: no evidence of disease; OS: osteosarcoma; EwS: Ewing's sarcoma; FD: fibrous dysplasia.  ^∗At the time of surgery.