Induction chemotherapy for locally advanced nasopharyngeal carcinoma: Efficacy and safety of the TPC regimen compared to GP and TPF.

Background And Objectives: Gemcitabine plus cisplatin (GP) and docetaxel plus cisplatin plus fluorouracil (TPF) are induction chemotherapy (IC) regimens for locally advanced nasopharyngeal carcinoma (LA-NPC). The oral convenience of capecitabine presents its potential as a fluorouracil substitute in the TPF regimen, which has yet to be thoroughly investigated. This study aims to compare the efficacy and safety of the docetaxel, cisplatin, and capecitabine (TPC) with GP and TPF in LA-NPC.

Methods: A retrospective analysis was conducted on newly diagnosed stage III-IVa nasopharyngeal carcinoma patients who received GP, TPC, or TPF induction chemotherapy followed by concurrent chemoradiotherapy (CCRT) between February 2019 and December 2021. A comparison of the prognostic outcomes and associated adverse reactions among patients receiving different IC regimens. Multivariate Cox regression was applied to analyze independent prognostic factors, and subgroup survival analyses were conducted based on these factors.

Results: A total of 291 LA-NPC patients were included, with 70 receiving TPC, 119 receiving GP, and 102 receiving TPF. Kaplan-Meier survival analysis indicated no significant differences in OS, PFS, LRFS, and DMFS among the 3 groups. Multivariate Cox regression identified T classification and clinical stage as independent prognostic factors. Subgroup analyses revealed no significant differences in OS and PFS between the 3 groups across T1-2 and T3-4 classifications or III and IVa stages.The TPC group exhibited lower incidence rates of treatment-related acute toxicity reactions, including grade 3-4 toxicities.

Conclusion: The TPC induction chemotherapy regimen demonstrates comparable efficacy to GP and TPF, while maintaining a favorable safety profile.