The Mast Cell

Mast cells (MC) are phylogenetically old cells which are distributed throughout the human organism. MC are found in almost all of the major organs and tissues of the body, particularly in association with connective tissue structures such as blood vessels, lymphatic vessels and nerves, and in proximity to surfaces that interface the external environment, such as those of the respiratory and gastrointestinal system and the skin. This selective accumulation at tissue sites where foreign material a