Table 1 Baseline and treatment characteristics
From: The extremity localized classic osteosarcomas have better survival than the axial non-classics
Characteristic | Classic | Non-classic | Total |
|---|---|---|---|
Gender | |||
Male | 43 | 17 | 60 (61.2%) |
Female | 25 | 13 | 38 (38.8%) |
Age | |||
0–10 | 13 | 1 | 14 (14.3%) |
11–20 | 40 | 9 | 49 (50.0%) |
21–30 | 10 | 1 | 11 (11.2%) |
31–40 | 5 | 5 | 10 (10.2%) |
41–50 | – | 4 | 4 (4.1%) |
51–60 | – | 6 | 6 (6.1%) |
> 60 | – | 4 | 4 (4.1%) |
Duration of symptoms | |||
≤ 2 months | 45 | 16 | 61 (62.2%) |
> 2 months | 23 | 14 | 37 (37.8%) |
Tumor site | |||
Around knee | 46 | 8 | 54 (55.1%) |
Distal femur | 31 | 4 | 35 (35.7%) |
Proximal tibia | 9 | 3 | 12 (12.2%) |
Proximal fibula | 6 | 1 | 7 (7.1%) |
Proximal humerus | 5 | 1 | 6 (6.1%) |
Other extremities | 17 | 4 | 21 (21.4%) |
Axial | – | 17 | 17 (17.3%) |
Tumor size | |||
≤ 8 cm | 39 | 21 | 60 (61.2%) |
> 8 cm | 29 | 9 | 38 (38.8%) |
Primary metastasis | |||
No | 68 | 19 | 87 (88.8%) |
Yes | – | 11 | 11 (11.2%) |
Lung | – | 9 | 9 (9.2%) |
Distal bones | – | 1 | 1 (1.0%) |
Other sites | – | 1 | 1 (1.0%) |
Serum ALP | 76 available | ||
Normal | 20 | 7 | 27 (35.5%) |
>ULN | 38 | 11 | 49 (64.5%) |
Serum LDH | 52 available | ||
Normal | 25 | 12 | 37 (71.2%) |
>ULN | 14 | 1 | 15 (28.8%) |
Type of extremity surgery | 81 available | ||
Limb salvage | 28 | 10 | 38 (46.9%) |
Amputation | 40 | 3 | 43 (53.1%) |