Abstract
Objective
The objective of the study was to present treatment and follow-up data over a 5-year period for patients treated with MammoSite™ breast brachytherapy at our institution. Patient data was collected regarding the specific treatment and planning volumes, the complications occurring during and after treatment, and the overall outcome of each patient relating to tumor-free survival.
Methods
We performed a retrospective analysis of patients who presented with early stage breast cancer and received breast conserving surgery. These patients elected to receive accelerated partial breast irradiation (APBI) using the MammoSite™ catheter device. Patients were treated with 30.6–34.0 Gy in 3.4 Gy fractions twice daily with a minimum of 6 h between fractions utilizing either a spherical or an ellipsoidal catheter device.
Results
From October 2005 to November 2010, 78 patients eligible for our retrospective analysis were treated with APBI using the MammoSite™ catheter device. The median follow-up time was 80 months. Of the patients in our study, there were a total of 10 recurrences. Five of these recurrences were local, two of the recurrences were local or new primaries that eventually developed into widespread metastatic disease, and three of the recurrences were widespread metastatic disease. Two were considered new primaries due to receptor status change in the new tumor.
Conclusions
This case series of 78 patients having greater than 24 months of follow-up from a single institution provides important data regarding failure analysis with MammoSite™ accelerated partial breast irradiation. Our results show a higher rate of metastatic recurrence in the group of patients with positive nodal disease.
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Miller, D.H., Pflederer, N., Malouff, T. et al. Analysis of treatment effectiveness and complications associated with MammoSite™ breast brachytherapy in patients treated at a single institution. J Radiat Oncol 6, 353–360 (2017). https://doi.org/10.1007/s13566-017-0320-9
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DOI: https://doi.org/10.1007/s13566-017-0320-9