Toxicity outcome of endorectal brachytherapy boost in medically inoperable patients.
2020
AIM: This communication reviews results and toxicity of image-guided high-dose-rate endorectal brachytherapy (HDREBT) boost after external beam radiotherapy (ERT) in medically inoperable patients with rectal cancer. MATERIALS AND METHODS: A total of 18 patients with rectal cancer and clinical stage T2-4N02 treated with HDREBT boost after ERT were retrospectively reviewed. RESULTS: Following treatment with a median total dose (EQD2, alpha/beta= 10) of 66Gy (range 48-92Gy), the incidence of early and late rectal grade 3 toxicity was 11% and 19%, respectively. There was no correlation between the occurrence of acute and late toxicity. CONCLUSION: With proper technique, a combined approach using EBRT and HDREBT was associated with acceptable toxicity in medically inoperable rectal cancer patients.
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