Initiation Of An Intraoperative Radiotherapy Program At A Safety Net Hospital: What Is The Impact Of An Intraoperative Radiotherapy Program In Underserved Patients With Early Breast Cancer?

Background Intraoperative radiotherapy (IORT) can allow for single-dose radiation treatment following breast conservation therapy in low-risk patients with early breast cancer, in lieu of a traditional 6-week course of whole breast radiotherapy (WBRT). The objective of this study was to analyze the uptake and utilization of an IORT program in a safety-net hospital. Materials and Methods A retrospective review was conducted for all patients who underwent IORT from September 2014 to June 2018. Patient demographics, tumor characteristics, and IORT outcomes were analyzed. The proportion of patients undergoing IORT were determined to assess utilization and uptake. Results There were 27 female patients that received IORT, 23 (85.2%) of which required no further radiotherapy. Three (7.4%) patients had positive axillary lymph nodes and/or positive margins requiring subsequent WBRT. One patient (3.7%) developed an in-breast recurrence distant from the lumpectomy site 23 months after IORT. Ten patients (37.0%) developed a postoperative complication, including 5 seromas and 6 wound complications (superficial infections and/or wound necrosis). Overall, in the 46-month study period, IORT accounted for only 6.4% of 423 operations. Still, 27 of 29 (93.1%) patients who met eligibility criteria for IORT underwent the procedure. Discussion Although IORT comprised only 6.4% of all cases due to higher rates of mastectomy rates and advanced disease in our population, there was a high uptake of IORT among patients who met eligibility criteria for the procedure. Major complication rates of IORT were low, and most patients successfully completed radiotherapy in 1 intraoperative dose.