NCIt definition : Lymphoid tissue located beneath the mucosal epithelia of those mucosal surfaces that
have contact with the external environment, such as the respiratory, digestive, and
urinary systems. MALT consists of a collection of predominantly small lymphocytes,
fewer larger, transformed lymphocytes, and plasma cells. It protects the body from
pathogens that enter via the mucosa. MALT gives rise to a distinctive type of B-cell
lymphoma that usually follows an indolent clinical course.;