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an accumulation, local or systemic, of mast cells in the tissues; known as urticaria pigmentosa when widespread in the skin.
diffuse mastocytosis (diffuse cutaneous mastocytosis) a condition in which the entire skin is thickened, lichenified, and leathery in appearance and accompanied by generalized erythroderma and intense pruritus as a result of widespread infiltration with mast cells. In children, it is often associated with systemic mastocytosis.
systemic mastocytosis a condition in which there are mast cell infiltrates in noncutaneous tissues, occurring with or without cutaneous lesions, and usually involving the liver, spleen, bone, lymph nodes, and gastrointestinal tract.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
infiltration of many organ systems by mast cells with varied clinical manifestations that can include fever, weight loss, flushing, bronchospasm, rhinorrhea, palpitations, dyspnea, diarrhea, gastrointestinal bleeding, and hypotension.
Synonym(s): systemic mastocytosis
Farlex Partner Medical Dictionary © Farlex 2012