Epidemiology

Mucosa-associated lymphoid tissue (MALT) lymphoma (also known as extranodal marginal zone lymphoma of MALT) accounts for approximately 5% to 8% of all non-Hodgkin's lymphoma.[9][10][11]​​​​ It is the most common type of marginal zone lymphoma (MZL), accounting for approximately 60% of all MZLs.[12]

The stomach is the most commonly affected extranodal site (gastric MALT lymphoma), accounting for approximately 30% to 40% of cases.[6][13]​​​ Other commonly affected sites include the ocular adnexa (24%), lung (12%), and salivary/parotid glands (10%).[6] The skin, intestinal tract, thyroid, breasts, dura, and genitourinary tract are less commonly affected.[7]

In the US, median age at diagnosis of MALT lymphoma is approximately 67 years.[12]

Use of this content is subject to our disclaimer