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  • Title: Interstitial brachytherapy for salvage treatment of vaginal recurrences in previously unirradiated endometrial cancer patients.
    Author: Nag S, Yacoub S, Copeland LJ, Fowler JM.
    Journal: Int J Radiat Oncol Biol Phys; 2002 Nov 15; 54(4):1153-9. PubMed ID: 12419443.
    Abstract:
    PURPOSE: To evaluate whether interstitial brachytherapy can effectively salvage vaginal recurrence from endometrial carcinoma. METHODS AND MATERIALS: Between September 1989 and September 2000, 13 previously unirradiated patients (mean age 70 years) with isolated vaginal recurrences from endometrial adenocarcinoma were treated with interstitial low-dose-rate brachytherapy with or without additional external beam radiotherapy. Brachytherapy was delivered using a modified perineal Syed template loaded with (192)Ir. The central cylinder was loaded with high-activity (192)Ir (n = 12) or (137)Cs (n = 1). RESULTS: The patients had initially presented with FIGO Stage I (n = 11) or III (n = 2) cancer. Vaginal recurrences were diagnosed at a mean interval of 27.5 months after hysterectomy (range 2-83). The patients were followed for a median of 60 months (range 15-105). Ten patients had recurrence at the vaginal apex and three had recurrence in the lower two-thirds of the vagina. The median time to recurrence was 22 months. The tumor size ranged from 1.5 to 6 cm (mean 2.2, median 2.5). Eleven of 13 patients received 45-50-Gy pelvic external beam radiotherapy, followed by a mean interstitial brachytherapy boost of 28.3 Gy (range 18-35). The 2 other patients received brachytherapy only of 40 Gy and 50 Gy, respectively. All tumors were locally controlled. Three (23%) of 13 patients had a relapse at distant sites (two in the paraaortic region and one in the liver). The overall 8-year actuarial disease-specific survival rate was 77%. Major (Grade 3 and 4) long-term morbidity occurred in 2 patients (15%) and included Grade 3 vaginal ulceration in 1 patient, and Grade 4 colovesical fistula requiring surgical intervention in 1 patient. Additional long-term morbidity included Grade 2 proctitis in 1 patient. CONCLUSION: Interstitial brachytherapy with or without supplementary external beam radiotherapy can effectively salvage vaginal recurrence from endometrial cancer with very favorable local control and overall survival and acceptable morbidity.
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