Urticaria pigmentosa
| Urticaria pigmentosa | |
|---|---|
| Other names | Generalized eruption of cutaneous mastocytosis (childhood type) |
| The back of a child with urticaria pigmentosa | |
| Specialty | Medical genetics |
Urticaria pigmentosa (also known as generalized eruption of cutaneous mastocytosis (childhood type): 616 ) is the most common form of cutaneous mastocytosis. It is a rare disease caused by excessive numbers of mast cells in the skin that produce hives or lesions on the skin when irritated.