Table 1 Demographic and clinical characteristics of optic nerve astrocytoma cases (n = 1004)
Characteristic | No. | % of Total |
|---|---|---|
Age at diagnosis (years) | ||
  ≤ 18 | 838 | 83.5 |
 >18 | 166 | 16.5 |
Sex | ||
 Female | 520 | 51.8 |
 Male | 484 | 48.2 |
Race | ||
 White | 833 | 83.0 |
 Black | 80 | 8.0 |
 Asian | 44 | 4.4 |
 Other | 22 | 2.2 |
 Unknown | 25 | 2.5 |
Year of diagnosis | ||
 <2010 | 616 | 61.4 |
  ≥ 2010 | 388 | 38.6 |
Surgery performance | ||
 Surgery, NOS | 169 | 16.8 |
 No surgery | 823 | 82.0 |
 Unknown | 12 | 1.2 |
Tumor size | ||
  ≤ 2 | 134 | 13.3 |
 >2 | 106 | 10.6 |
 Unknown | 764 | 76.1 |
Diagnostic Confirmation | ||
 Radiography without microscopic confirm | 674 | 67.1 |
 Clinical diagnosis only | 25 | 2.5 |
 Positive histology | 281 | 28.0 |
 Positive laboratory test/marker study | 1 | 0.1 |
 Direct visualization without microscopic confirmation | 6 | 0.6 |
 Positive microscopic confirm, method not specified | 2 | 0.2 |
 Unknown | 15 | 1.5 |
Tumor Extension | ||
 Unknown | 171 | 17 |
 Distant site(s)/node(s) involved | 31 | 3.1 |
 Localized only | 713 | 71.0 |
 Regional, NOS | 89 | 8.9 |
Laterality | ||
 Right - origin of primary | 279 | 27.8 |
 Left - origin of primary | 244 | 24.3 |
 Bilateral, single primary/paired site | 244 | 24.3 |
 Unknown | 237 | 23.6 |
Histology Type | ||
 Low-grade astrocytic tumors | 953 | 94.9 |
 High-grade astrocytic tumors | 11 | 1.1 |
 Astrocytoma, NOS | 40 | 4 |