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The Frequency of each Pathologic Grade in Patients with Osteosarcoma after Neoadjuvant Chemotherapy
| Grade | Number of patients (percent) |
|---|---|
| Grade I without necrosis | 2 (13.3%) |
| Grade II (50% - 89% necrosis) | 4 (26.7%) |
| Grade III (90% ≤ necrosis < 100) | 7 (46.7%) |
| Grade IV (100% necrosis) | 2 (13.3%) |
