Local Recurrences After Different Treatment Strategies for Ductal Carcinoma In Situ of the Breast: A Population-Based Study in the East Netherlands

In a defined population outside a trial setting, RT after BCS for DCIS lowered recurrence rates. Besides the use of RT, a microscopically complete excision of DCIS is essential. This is especially true for patients with symptomatically detected DCIS and with tumors that contain comedo necrosis, as these groups are at particular high risk for recurrent disease.