alexa A Phase I Study using low-dose fractionated whole abdominal radiotherapy as a chemopotentiator to full-dose cisplatin for optimally debulked stage III IV carcinoma of the endometrium.
Oncology

Oncology

Journal of Nuclear Medicine & Radiation Therapy

Author(s): Wrenn DC, Saigal K, Lucci JA rd, Pearson MJ, Simpkins F,

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Abstract OBJECTIVE: To evaluate the feasibility of combining low-dose fractionated whole abdominal radiation (LDF-WAR) with weekly full-dose cisplatin (FD-CDDP) for patients with stage III/IV endometrial carcinoma. METHODS: Patients with optimally debulked stage III/IV carcinoma of the endometrium (without extra-abdominal disease) were eligible for the study. Postoperatively, patients received the institutional standard systemic chemotherapy and vaginal brachytherapy. Patients then underwent experimental six weekly cycles of FD-CDDP (40 mg/m², maximum 70 mg IV) followed by LDF-WAR 6-8 hours after initiation of chemotherapy. In a conservative design, 6 patients were accrued to two sequential cohorts of LDF-WAR, at 0.5 Gy/fraction [Fx] (total 3 Gy) and 0.75 Gy/Fx (total 4.5 Gy). Toxicities and laboratory studies were evaluated at each visit. RESULTS: Twelve patients were enrolled from January 2005 to June 2009 with median follow-up of 13.5 months (range: 5-27 months). Seventy-five percent of enrolled patients had uterine papillary serous histology. Eleven patients at least partially completed therapy (range: 2-6 cycles of FD-CDDP/LDF-WAR) with one additional patient opting out at the higher dose level. Combination therapy overall was well tolerated. Three patients in each cohort experienced grade 3 acute hematologic events with one recorded grade 4 toxicity in the second cohort. Of patients receiving any of the experimental treatment, five have experienced recurrences. Three of these patients were in cohort one and received 0.5 Gy/Fx LDF-WAR. CONCLUSION: Combination therapy with LDF-WAR as a novel chemopotentiator to FD-CDDP is a feasible adjuvant regimen in optimally debulked patients with stage III/IV endometrial carcinoma. Further investigation is warranted to determine treatment efficacy. Copyright © 2011 Elsevier Inc. All rights reserved. This article was published in Gynecol Oncol and referenced in Journal of Nuclear Medicine & Radiation Therapy

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