Table 1. Demographic variables.

Demographic Variables
Total number of patients with bone tumors	n=895
Number of patients with Ewing's sarcoma	n=147
Gender distribution
Males	n=88
Females	n=59
Age distribution
0-20 years	n=67
21-40 years	n=42
41-60 years	n=37
61-80 years	n=1
Site involvement
Lower limbs	n=76
Upper limbs	n=63
Pelvis	n=8
Regional lymph node involvement at presentation	n = 34
Distant metastasis at presentation	n = 14