Primary Malignant Lymphoma of the Breast Treated by Breast Conserving Therapy-Report of a Case-

A 33-year-old unmarried woman was admitted to the hospital because of a left breast tumor. She was diagnosed as having a primary malignant lymphoma of the breast (B cell lymphoma; diffuse, large cell type) by clinical examinations. Breast conserving therapy was performed after obtaining informed consent. Radiation to the residual breast (50 Gy) and one course of CHOP therapy were added. The therapy and prognosis for malignant lymphomas of the breast are determined by histopathological classification and clinical stage. This case was classified into intermediate-grade by a Working Formulation, and clinical stage IA by the Ann Arbor's classification, thus candidate for a better prognosis. We regard this case as a good indication of the breast conserving therapy with radiation.