Blurry boundaries: Do epithelial borderline lesions of the breast and ductal carcinoma in situ have similar rates of subsequent invasive cancer?
Carcinoma, Ductal, Breast
Carcinoma, Intraductal, Noninfiltrating
When compared with DCIS, borderline lesions do not demonstrate lower rates of IBE or invasive IBE. Despite "borderline" histology, a 5 year IBE rate of 7.7 % and an invasive IBE rate of 6.5 % suggest that the risk of future carcinoma is significant and similar to that of DCIS.