Patients identified with neurofibromatosis type 1 (NF1) optic pathway gliomas (OPGs) and data collection
| Patient groups | |||
| Manchester | Guys | ||
| Total NF1 | 788 | 543 | |
| Total NF1 OPG | 45 | 35 | |
| Eligible | 28 | 19 | |
| Seen (subjects) | 18 | 11 | Patient group for the molecular study |
| Declined | 4 | 8 | |
| Unable to be contacted | 6 | 0 | |
| New diagnosis after recruitment | 0 | 2 | |
| Deceased | 13 | 4 | |
| Child | 4 | 10 | |