This is the first large multicenter randomized study to demonstrate improved EFS for chemotherapy compared with RT alone. It is anticipated that this regimen could reduce ototoxicity and nephrotoxicity compared with cisplatin-containing schedules. The importance of avoiding interruptions to RT has been confirmed.
No clinically relevant differences in the pharmacokinetics of capecitabine and its key metabolites 5'-DFUR, 5'-DFCR, and 5-FU were found between Japanese and Caucasian patients. Plasma concentrations of FBAL were higher in Caucasian than in Japanese patients but this difference is not clinically relevant as FBAL has no antiproliferative activity and systemic exposure to FBAL does not correlate with the tolerability of capecitabine.
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