Table 1 Summary of clinical characteristic and course classified by primary site
Variables | Cranial bone, n = 13 | Mobile spine, n = 20 | P-value |
|---|---|---|---|
Age | Â | Â | Â |
 Mean (range), years | 14.8 (1–42) | 22.6 (2–45) | 0.047 |
Gender | Â | Â | Â |
 Male | 7 (53.8%) | 12 (60.0%) | 0.727 |
 Female | 6 (46.2%) | 8 (40.0%) |  |
Maximum tumor diameter: mean (range), (cm) | 5 (3.0–9.0) | 6 (4.0–10.0) | 0.712 |
Disease duration: mean (range), months | 2.5 (0.2–7.0) | 1.9 (0.2–6.0) | 0.008 |
Predominant presenting symptom | Â | Â | Â |
 Pain | 9 (69.2%) | 12 (60.0%) |  |
 Neurological deficit | 2 (15.4%) | 7 (35.0%) |  |
Mode of installation of symptoms | Â | Â | Â |
 Acute or subacute | 9 (69.2%) | 13 (65.0%) |  |
Progressive | 4 (30.8%) | 7 (35.0%) | Â |
Number of recurrences | 8 (61.5%) | 11 (55.0%) | 0.710 |
Distant metastasis | 2 (15.4%) | 7 (45.0%) | 0.263 |
Median survival time: months | 19 | 25 | 0.386 |
2-Year progression-free survival rate (%) | 23.1 | 35.0 | 0.368 |
1-Year survival rate (%) | 76.9 | 80.0 | 0.581 |
2-Year survival rate (%) | 46.2 | 60.0 | 0.284 |
5-Year survival rate (%) | 20.5 | 29.2 | 0.558 |
KI-67 index: mean (range) | 41.0 (2–70) | 33.9 (3–80) | 0.614 |