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Mucosa-associated lymphoid tissue lymphoma of the lingual tonsil.

(Editorial Comment: The authors describe a patient with MALT lymphoma of the tonsil with concurrent gastrointestinal pathology.) Lymphoma of mucosa-associated lymphoid tissue (MALT) arising from the lingual tonsil is a rare phenomenon. We present the third case reported in the literature of MALT lymphoma of the lingual tonsil. The gastrointestinal tract is the most frequent extranodal location for low grade B-cell lymphomas of MALT type. When Waldeyer’s ring is involved, the palatine tonsil is the most commonly affected site. Only 2 cases have previously described lingual tonsillar involvement; however, none exhibited any concurrent gastrointestinal pathology. We present the first case of MALT lymphoma of the lingual tonsil with synchronous gastric involvement. Discovery of MALT lymphoma in the lingual tonsil should prompt complete gastrointestinal evaluation to detect any additional foci of disease that may be present. Further study is necessary to determine appropriate therapy. Lymphomas derived from mucosa-associ