Diagnostic criteria for neurofibromatosis type 1 (NF1) [9]
| Two or more of the criteria below are required for diagnosis: |
| Six or more café au lait macules (>0.5 cm in children or >1.5 cm in adults) |
| Two or more cutaneous or subcutaneous neurofibromas or one plexiform neurofibroma |
| Axillary or groin freckling |
| Optic pathway glioma |
| Two or more Lisch nodules (iris hamartomas seen on slit lamp examination) |
| Bony dysplasia (sphenoid wing dysplasia, bowing of long bone±pseudoarthrosis) |
| First-degree relative with NF1 |