Purpose: To report the treatment effect of interstitial brachytherapy for chest wall locoregional recurrence of breast cancer.
Material and methods: This 44-year-old female presented with chest wall recurrence seven years after modified radical mastectomy for stage II breast cancer. Despite external beam radiation and chemotherapy, the lesion expanded as 5.3 x 5.1 x 3.0 cm(3), and 8.0 x 5.1 x 4.0 cm(3). The locoregional recurrent tumor was treated with interstitial brachytherapy under ultrasound guidance. The brachytherapy dose was 30 Gy in 6 fractions of 5 Gy each.
Results: Removal of the recurrent tumor was securely achieved by interstitial brachytherapy guided with ultrasound scanning. The refractory tumor in patient healed uneventfully after interstitial brachytherapy without recurrence during the 7 months of follow-up.
Conclusions: The ultrasound-guided interstitial brachytherapy may be effective for refractory recurrence of breast cancer.