Table 1 The clinicopathologic characteristics of 45 patients who were diagnosed with radiation-induced osteosarcoma of the maxilla and mandible (RIOSM) after undergoing radiotherapy for nasopharyngeal carcinoma
Characteristic | No. of patients (%) |
|---|---|
Sex | |
 Men | 33 (73.3) |
 Women | 12 (26.7) |
Age (years) | |
 ≤49 | 21 (46.7) |
 >49 | 24 (53.3) |
Tumor size (cm) | |
 ≤5 | 22 (48.9) |
 >5 | 23 (51.1) |
Tumor site | |
 Maxilla | 33 (73.3) |
 Mandible | 12 (26.7) |
Latency period (years) | |
 ≤8.0 | 23 (51.1) |
 >8.0 | 22 (48.9) |
Margin statusa | |
 Negative | 24 (61.5) |
 Positive | 15 (38.5) |