Table 1.
Demographic Characteristics of All Patients With Ependymoma, 1975–2016 (n = 6076)
| Frequency (n) | Percent (%) | |
|---|---|---|
| Mean age at diagnosis in years (standard deviation) | 37.1 (21.87) | |
| Gender | ||
| Male | 2800 | 46.1 |
| Female | 3276 | 53.9 |
| Race | ||
| White | 5121 | 84.3 |
| Not white or unknown | 955 | 15.7 |
| Anatomical location of tumor | ||
| All supratentorial brain, overlapping lesion of brain, and brain, not otherwise specified (NOS) | 1116 | 18.4 |
| Spinal cord, spinal meninges, cerebral meninges, and cauda equina | 3323 | 54.7 |
| Posterior fossa, cerebellum, and brainstem | 1083 | 17.8 |
| Ventricles | 540 | 8.9 |
| Cranial nerves and other | 14 | 0.2 |
| Type of surgery | ||
| Received surgery or unknown | 5674 | 93.4 |
| Did not receive surgery | 402 | 6.6 |
| Biopsy | ||
| No biopsy | 4045 | 66.6 |
| Biopsy | 2031 | 33.4 |
| STR | ||
| No STR | 5543 | 91.2 |
| STR | 533 | 8.8 |
| GTR | ||
| No GTR | 4699 | 77.3 |
| GTR | 1377 | 22.7 |
| Radiation | ||
| No radiation | 3816 | 62.8 |
| Radiation | 2260 | 37.2 |
| All-cause mortality | ||
| Alive | 4462 | 73.4 |
| Died | 1614 | 26.6 |
| Grade | ||
| Well differentiated | 326 | 5.4 |
| Moderately differentiated | 656 | 10.8 |
| Poorly differentiated | 120 | 2.0 |
| Undifferentiated | 579 | 9.5 |
| Unknown | 4395 | 72.3 |
| Histology | ||
| Ependymoma, NOS | 4126 | 67.9 |
| Ependymoma, anaplastic | 766 | 12.6 |
| Papillary ependymoma | 60 | 1.0 |
| Myxopapillary ependymoma | 1124 | 18.5 |