Characteristic Case n (%)
Gender
Male 12(60)
Female 8(40)
Age/year
<18 14(70)
≥18 6(30)
Clinical stage
I 1 (5)
II 14(70)
III 5(25)
Tumor size
<8cm 5(25)
≥8cm 15(75)
Location
Tibia 7(35)
Femur 11(55)
other 2(10)
Subtype
Osteoblastic 8(40)
Chondroblastic 7(35)
Fibroblastic 3(15)
Mixed 2(10)