Mast CellJAMA A granulocyte found in tissue. The contents of the mast cells, along with those of basophils, are responsible for the symptoms of allergy. See also Basophil; Granulocyte.
a basophil (a type of granular white blood cell) that
has left the bloodstream and entered a tissue. Mast cells release histamine
and heparin, chemicals which mediate allergic reactions.
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