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- W2288821247 abstract "13507 Background: Combined pre-operative RT and CT increase the possibility for conservative surgery in locally advanced rectal cancer. Most clinical trials show that responding patients could obtain a reduction of local relapse and an improvement of overall survival, especially when a complete pathological response is obtained (pCR 9–29%). The aim of our study was to determine the activity of RT concomitant to oxaliplatin (OHP) in combination with c.i. 5-fluorouracil (5FU). Methods: Primary endpoint was pCR. Sample size was defined according to Simon Two-Stage phase II design (planned sample size: 29 evaluable patients). From May 2002 to November 2005, 33 patients (15 males, 18 females) were enrolled: median age was 64 years (range 21–74); clinical stage was cT3/cT4 cN0 or cT any cN+ M0. In 24 patients rectal cancer was ≤ 5 cm from anal verge. Weekly OHP 60 mg/m 2 was administered in combination with c.i. 5FU 225 mg/ m 2 for 5 days per week. Twelve patients received conventional RT (CRT): 25 fractions with 1.8 Gy, total dose 50.4 Gy on the pelvis and a boost on tumor bed with 3 fractions of 1.8 Gy. 21 patients received hyperfractionated RT (HRT): 1.2 Gy b.i.d. for 5 days per week for 4 weeks and a concomitant boost on tumor bed with daily 3 Gy (total dose 54–56 Gy on tumor bed, 48–50 Gy on the pelvis). Patients underwent surgery after 6–8 weeks from the end of treatment. Results: All patients were evaluable for pathological response. Sphincter preservation was obtained in 30 patients (=90.9%), a clinical down-staging in 30 patients (=90.9%). Overall, 12 patients (=36.4%) experienced a pCR: 9 of 21 patients (=42.8%) who received HRT obtained a pCR; 3 of 12 patients (=25%) who received CRT showed a pCR. Treatment was well tolerated. No G3–4 toxicity was observed. Conclusions: The results of our study are promising in terms of sphincter preservation, clinical down-staging and pCR. Moreover in this trial patients who received HRT obtained an encouraging outcome. No significant financial relationships to disclose." @default.
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- W2288821247 date "2006-06-20" @default.
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- W2288821247 title "Concurrent radiotherapy (RT) and chemotherapy (CT) with oxaliplatin as primary treatment of advanced rectal cancer: a phase II study" @default.
- W2288821247 doi "https://doi.org/10.1200/jco.2006.24.18_suppl.13507" @default.
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