Abstract
A 47-year-old woman was seen the hospital because of a tumor of the right breast and axillar tender masses. Aspiration cytology suggested malignant non-epithelial tumor, and modified radical mastectomy was carried out. Histologically, the tumor was non-Hodgkin lymphoma, diffuse mixed type on LSG classification. Postoperative examination disclosed no abnormal findings and so it was diagnosed as primary malignant lymphoma of the breast. Two years have passed since postoperative chemotherapy, but there have been no signs of recurrence. This disease is relatively uncommon and 133 cases have been reported in Japan. The clinical features of this disease could be drawn as follows: (1) The right c side resion was predominatly exsited, and the tumor size on diagnosis was bigger than that of the breast cancer. (2) Any preoperative image diagnoses were not useful, and excisional biopsy led to a correct diagnosis.(3) The 5-year survivasl rate of primary malignant lymphoma of the breast was poorer than that of breast cancers, 37.5%. (4) Prognosis was strongly related to tumor size and axillar lymph node involvement. Curative operation inclusivc of chemotherapy and radiotherapy should be also taken into consideration for the better prognosis.
