Abstract
We report a case of primary mucosa-associated lymphoid tissue (MALT) lymphoma in the esophagus that manifested as a large submucosal tumor (SMT). Primary esophageal lymphoma is very rare, occurring in less than 1% of all patients with gastrointestinal lymphoma. Only a few cases of MALT lymphoma in the esophagus have been reported in the English literature. A 53-year-old man was referred to Dongguk University Ilsan Hospital (Goyang, Korea) in July 2012 for further evaluation and treatment of an esophageal SMT. Endoscopy showed a cylindrically elongated submucosal mass with normal overlying mucosa in the mid esophagus, 25–30 cm from the incisor teeth. He underwent surgery to confirm the diagnosis. Pathologic findings showed diffuse small atypical lymphoid cells which were stained with Bcl-2, CD20, but not with CD3, CD5, CD23, Bcl-6, or cyclin D1. These cells showed a positive monoclonal band for immunoglobulin heavy chain gene rearrangement. Based on the pathological, immunohistochemical, and molecular biological features, the esophageal mass was diagnosed as extranodal marginal zone B-cell lymphoma of the MALT type.
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Table 1.
MALT, mucosa‐ associated lymphoid tissue; MCTD, mixed connective tissue disease; Tbc, tuberculosis; U, upper; M, middle; L, lower; ND, no description in the original reports; SMT, submucosal tumor; CHOP, cyclophosphamide, doxorubicin, vincristine, and prednisolone; R‐ CHOP, rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisolone; EMR, endoscopic mucosal resection.