<prompt> Most common site of Mucosa-associated lymphoid tissueDuodenumJejunumIleumStomach  <response>: MALT lymphoma is a form of lymphoma involving the mucosa-associated lymphoid tissue MALT, frequently of the stomach, but viually any mucosal site can be afflicted. It is cancer originating from B cells in the marginal zone of the MALT and is also called extranodal marginal zone B cell lymphoma. ref - pubmed.com 