Table 1.

Clinical features of 48 OS patients.

Variables	Number of patients (%)
Sex
Man	30 (62.5%)
Woman	18 (37.5%)
Median age	19 (range 1–73 years)
Tumor grade
High Grade	35 (73%)
Low grade	13 (27%)
Clinical course
Disease free	18 (37.5%)
Relapsed	30 (62.5%)
Local recurrence	8 (16.6%)
Metastasis	26 (54%)
Both	4 (8.3%)
Outcome
Alive	23 (48%)
Dead	25 (52%)