MRI findings observed in 8 patients after proton therapy
| Time from Completion of Proton Therapy to First MRI with Changes (mo) | Time from Appearance of Changes to Start of Resolution of Changes (mo) | Location of Abnormal Signal/Enhancement | Physical Examination Findings | |
|---|---|---|---|---|
| Patient | ||||
| 1 | 5.3 | 2.2 | Brain stem, cerebellum, upper cervical spinal cord | None |
| 2 | 3.6 | 2.3 | Brain stem | Unilateral weakness |
| 3 | 5.6 | 3 | Cerebellum | None |
| 4 | 3.4 | 3.1 | Right thalamus (no enhancement) | Unilateral weakness |
| 5 | 6.3 | 2.2 | Brain stem | None |
| 6 | 4.2 | 1.5 | Brain stem and cerebellum | Unilateral weakness |
| 7 | 3 | Patient died of disease before follow-up | Brain stem | None |
| 8 | 3.2 | 3.5 | Brain stem | Ataxia |
| Median | 3.9 | 2.3 (of 7 with follow-up MRI) | ||
| Mean | 4.3 | 2.5 (of 7 with follow-up MRI) |