A '''mast cell''' is a type of white blood [[cell]].
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A '''mast cell''' is a type of white blood [[cell]]. They are long-lived tissue-resident cells,<ref>https://www.immunology.org/public-information/bitesized-immunology/cells/mast-cells</ref> located in mucosal and epithelial tissues.<ref>https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4701915/</ref>