Urticaria pigmentosa

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Overview	Symptoms	Treatment	Prevention

Urticaria pigmentosa

Alternative Names

Mastocytosis; Mastocytoma

Symptoms

Appearance of brownish lesions on skin
Welt or hive formation when lesions are rubbed or scratched
Blister formation over lesion when it is rubbed
Facial flushing

Severe form:

Diarrhea
Fast heart rate
Headache
Fainting (syncope)

Exams and Tests

Urine histamine -- shows elevated levels of histamine
Skin biopsy -- confirms the presence of increased number of mast cells


Dermatographism - close-up


Dermatographism on the arm


Urticaria pigmentosa in the armpit


Mastocytosis, diffuse cutaneous


Urticaria pigmentosa on the chest


Urticaria pigmentosa - close-up


Dermatographism on the back

Review Date: 10/23/2006
Reviewed By: Kevin Berman, MD, PhD, Associate, Atlanta Center for Dermatologic Disease, Atlanta, GA. Review provided by VeriMed Healthcare Network.

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