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Mastocytosis
Guide picks
A disorder characterized by abnormal accumulations of mast cells in skin (urticaria pigmentosa), and in bone marrow, and internal organs such as the liver, spleen and lymph nodes (systemic mastocytosis).

Jackie's Story: Urticaria Pigmentosa
Personal site tells the story of child's life with the disorder.

The Mastocytosis Society, Inc.
Site offers FAQs, a picture gallery, resources, and an email listserv.

NIAID: Mastocytosis
Comprehensive information from the National Institute of Allergy and Infectious Diseases (U.S.).

Your Family Doctor: Mastocytosis
Information on the disorder from the American Association of Family Physicians.

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