Urticaria pigmentosa

Urticaria pigmentosa
Other namesGeneralized eruption of cutaneous mastocytosis (childhood type)
The back of a child with urticaria pigmentosa
SpecialtyMedical genetics 

Urticaria pigmentosa 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.

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