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Clinical Outcome in Patients with Pediatric Urticaria Pigmentosa (Only Patients with Follow-Up of 12 to 20 Years Included)
| n | Mean follow-up, years | Activating c-kit mutations | |
|---|---|---|---|
| Persistent UP | 11* | 15.4 | 4/11 (36.4%) |
| Transient UP | 9 | 15.2 | 4/9 (44.4%) |
| Total | 20 | 15.3 | 8/20 (40.0%) |
*Including one patient with marked improvement of the disease.
