Table 2.
Field of radiotherapy and pattern of recurrence
| Tumor site | CTx | RT field | No. | Recurrence | ||
|---|---|---|---|---|---|---|
| Intracranial | Spinal | |||||
| In-field | Out-field | |||||
| Solitary/Bifocal | (−) | WB | 5 | 1 | - | 2 |
| CSA | 36 | 2 | - | - | ||
| (+) | IF only | 25 | 1a) | 4+1a) | - | |
| WV | 54 | - | - | 1 | ||
| WB | 3 | - | - | - | ||
| CSA | 21 | - | - | - | ||
| Multifocal/Seeding | (−) | CSA | 9 | - | - | - |
| (+) | IF only | 3 | - | 2 | - | |
| WV | 2 | - | - | - | ||
| WB | 1 | - | - | - | ||
| CSA | 30 | - | - | - | ||
CSA, craniospinal axis followed by involved-field boost; CTx, chemotherapy; IF, involved-field; RT, radiotherapy; WB, whole brain followed by involved-field boost; WV, whole ventricle followed by involved-field boost.
a)
Combined intracranial in-field and out-field recurrences in a case.