the differential diagnosis of primary and metastic cancer was based on the combination of clinical and morphological data : the extent and stage of the process in both mammary glands , localization of tumor nodes , duration of the interval between the development of cancer in the first and the second mammary gland , the absence of relapses and metastases after treatment of the first carcinoma and during a year after the second mastectomy , the degree of malignancy of the tumors , invasion of blood and lymph vessels of the gland and the background against which the tumor had developed .
C0006826
malignancy
C0027651
tumor