Table 2 Risks for metastasis

Age

≧ 56 years

8

42

0.54

< 56 years

10

43

Sex

Male

12

47

0.24

Female

6

38

Site

Upper extremity

2

14

0.72

Lower extremity

11

47

Trunk

5

24

Origin

Bone

6

19

0.20

Soft tissue

12

66

Histological grade

Low

3

37

0.009

0.01

3.9

High

15

48

Extracompartment extension

No

5

36

0.15

Yes

13

49

Tumor size

≧ 50 mm

13

57

0.58

< 50 mm

5

28

Surgical margin

Adequate

15

74

0.56

Inadequate

3

11

D-dimer levels

≧ 0.41 μg/ml

15

44

0.002

0.003

5.0

< 0.41 μg/ml

3

41