The management of nongastric MALT lymphomas.

The group of marginal zone B-cell lymphomas (MZL) comprises three different entities, extranodal marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue (currently called MALT lymphoma), nodal marginal zone B-cell lymphoma (previously known as monocytoid lymphoma), and splenic marginal zone B-cell lymphoma (with or without circulating villous lymphocytes).[1-3] Primary splenic and nodal MZLs are rare, each comprising approximately less than 2% of lymphomas, while the extranodal MZL of MALT type is not uncommon, representing approximately 7% to 8% of the total number of non-Hodgkin lymphoma cases.[4]