local recurrences in the breast appear to be more frequent in patients less than or equal to 35 years of age treated with tumorectomy and irradiation than in patients older than 35 years , but in patients aged less than or equal to 50 or greater than 50 or less than or equal to 35 or greater than 35 years , there was no significant statistical difference between tumorectomy and irradiation or mastectomy nor was there a difference in disease-free survival .
C0006141
breast
C0024881
mastectomy