異時性に発生した両側耳下腺MALTリンパ腫の1例

概要

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Extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT) is a low-grade Bcell lymphoma. MALT lymphoma is a new disease entity, proposed by Isaacson in 1983. We report a rare bilateral case of MALT lymphomas of the parotid glands occurring after an interval of 11 years. The patient was a 52-yearold man who presented with a swelling in the left preauricular area. The region was surgically excised. The diagnosis was a benign lymphoepithelial lesion of the left parotid gland at that time. No recurrence has occurred in the left parotid gland. Eleven years after the first operation, a swelling developed in the right preauricular area. Partial excision of the right parotid gland was performed. The pathological diagnosis was a MALT lymphoma of the right parotid gland. Given the diagnosis, the excised tissue of the left parotid gland was examined again. A MALT lymphoma of the left parotid gland was diagnosed on histological and immunohistological examinations. The patient remains free of recurrence 3 years after the second operation.
Japanese Society of Oral and Maxillofacial Surgeonsの論文