Low-Grade Malignant B-Cell Lymphoma of MALT type of the Lung

Summary A case of low-grade maHgnant B-cell lymphoma of MALTtype arising in the lung is described. The patient was 64-year-old man, and had middle lobe syndrome of the right lung because of the tumor infiltration to the right middle bronchus. The histologic features of the tumor was diffuse, centrocyte-like lymphoma, and the immunohistochemical studies and gene analysis con firmed this tumor of B-cell orign. The patient is alive with local recurrence of the lymphoma in the right lung for 33 month now.