| with cluster headaches | 2 | other |
| in appearance | 2 | other |
| scan → be → normal | 24 |
| scan → appear → normal | 4 |
| scan → look → normal | 3 |
| negative | neutral | positive |
| 0.166 | 0.541 | 0.294 |
| Raw frequency | 31 |
| Normalized frequency | 0.409 |
| Modifier score | 0.833 |
| Perplexity | 306.287 |