NCIt related terms : Immunoproliferative disease, NOS; Immunoproliferative small intestinal diseases; Immunoproliferative small intestinal disease;
NCIt definition : A clonal disorder, also known as immunoproliferative small intestinal disease or Mediterranean
lymphoma, characterized by the secretion of a defective alpha heavy chain. It predominantly
affects young people in the Mediterranean region. It involves the small intestine,
and patients usually present with malabsorption syndrome, abdominal pain, weight loss,
and fever. There is extensive villous atrophy of the small intestinal mucosa, which
is heavily infiltrated by small lymphocytes and plasma cells. The small intestinal
morphologic changes are consistent with a mucosa-associated lymphoid tissue lymphoma
(MALT lymphoma).;