A carcinoma of the right breast arising after a mastectomy in primary malignant lymphoma of the left breast

Abstract In 1987, a 51-year-old woman visited our hospital, having noticed a painless 1.5 x 1.5 cm tumor of the left breast. On biopsy, it was pathologically diagnosed as being a primary malignant lymphoma of the breast. Thus we performed a modified radical mastectomy (Patey's method), in combination with chemotherapy (Cyclophosphamide, Vincristine, Prednisolone). Two years after the operation, a tumor of the right breast, 1.0 x 1.0 cm in size, was noticed. At this time, since an excised specimen was pathologically determined as being a scirrhous carcinoma, we performed a modified radical mastectomy (Auchincloss' method), followed by chemotherapy (Tegafur).