Comparison of Treatment Outcome Between Invasive Lobular and Ductal Carcinomas in Patients Receiving Partial Breast Irradiation With Intraoperative Electrons

Despite a favorable tumor profile, accelerated partial breast irradiation with IORT led to a higher incidence of IBTRs in patients with ILC compared with those with IDC. Our institutional experience emphasized the importance of the size of the irradiation field, pointing to the use of larger collimators, even when dealing with small tumors, to improve local control.