Epidemiology

MALT lymphoma accounts for approximately 7% to 8% of all B-cell lymphomas and is considered the third most common type of non-Hodgkin's lymphoma.[5][6] Furthermore, it is the most common type of primary extranodal lymphoma and represents up to 50% of primary gastric lymphomas.[1][5] Median age at presentation is 61 years, with a slight female preponderance (male:female ratio 1:1.12).[7]

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