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Table 1 Clinical Features

From: The expression and significance of IDH1 and p53 in osteosarcoma

Features Total(N) Percentage
Age(year)   
   <12 3 6.8%
   13--20 14 31.8%
   21--30 8 18.2%
   31--40 14 31.8%
   41- 5 11.4%
Sex   
   Male 32 72.7%
   Female 12 27.3%
Localization of primary tumor   
   Distal femur 13 29.5%
   Proximal tibia 11 25.0%
   Humerus 3 6.8%
   Tibia diaphysis 5 11.4%
   Femur diaphysis 7 15.9%
   Other 5 11.4%
Histological type   
   Osteoblastic 29 65.9%
   Small cell 1 2.3%
   Chondroblastic 6 13.6%
   Teleangetatic 1 2.3%
   Round cell 2 4.5%
   Fibroblastic 4 9.1%
   Mixed 1 2.3%
Histological Rosen grade*   
   1 5 11.3%
   2 16 36.4%
   3 16 36.4%
   4 7 15.9%
   1+2 21 47.7%
   3+4 23 52.3%
Metastasis   
   no 23 53.3%
   lung 17 38.6%
   other 4 9.1%
  1. *As described previously [3032], Grade 1: <50% tumor necrosis; Grade2: 50% to 90% tumor necrosis; Grade 3: > 90% tumor necrosis;Grade 4: 100% tumor necrosis.1+2: low grade; 3+4: high grade.