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The cutaneous distribution of segmental vitiligo
| Regions | Number of cases |
| V1 | 11 (42.3%) |
| V2 | 5 (19.2%) |
| V3 | 4 (15.4%) |
| V1 and V2 | 2 (7.7%) |
| Upper arm | 2 (7.7%) |
| Chest | 1 (3.8%) |
| Lumber | 1 (3.8%) |
| Total | 26 (100%) |
V1 means a region of a first branch of the trigeminal nerve.
