Table 1

Patient characteristics

FeaturesNo.
Median age (range)17 (5–51)
Gender
 Male34
 Female26
Tumor site
 Trunk4
 Extremity56
Primary metastases
 Absent50
 Detected10
Primary or secondary osteosarcoma
 Primary57
 Secondary3
Grade
 High-grade central osteosarcoma60
Histological subtype
 Osteoblastic29
 Fibroblastic17
 Chondroblastic6
 Teleangiectatic4
 Sclerotic3
 Small cell1
Tumor response to chemotherapy
 Good34
 Poor22
 NA4
Response grades (refs. 14 and 15 )
 Grade 19
 Grade 27
 Grade 318
 Grade 414
 Grade 58
 Grade 60
 NA4
Surgical remission (surgical margins; ref. 16 )
 Wide49
 Radical1
 Marginal3
 Intralesional3
 NA4
  • Abbreviation: NA, data not available.