Cisplatin and capecitabine induction chemotherapy in nasopharyngeal carcinoma.

Authors

null

Zhiyuan Xu

Department of Clinical Oncology,The University of Hong Kong-Shenzhen Hospital,Shenzhen,China, Shenzhen, China

Zhiyuan Xu , Li Yang , Victor Ho-Fun Lee , Anne W. M. Lee

Organizations

Department of Clinical Oncology,The University of Hong Kong-Shenzhen Hospital,Shenzhen,China, Shenzhen, China, Department of Clinical Oncology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China, The University of Hong Kong-Shenzhen Hospital, Hong Kong, China

Research Funding

Other Foundation
Shenzhen Key Medical Discipline Construction Fund (No. SZXK014) and Shenzhen Science and Technology program (Grant No: KQTD20180411185028798)

Background: Induction chemotherapy (IC) followed by concurrent chemoradiotherapy (CCRT) is now one of the standard treatment for locally advanced nasopharyngeal carcinoma (LANPC). Cisplatin/fluorouracil is one of the recommended IC regimens. Capecitabine is an oral fluoropyrimidine prodrug with higher concentrations of fluorouracil attained in the tumor cells after enzymatic conversions. We conducted this study to evaluate the feasibility, efficacy and safety of cisplatin and capecitabine (PX) IC followed by CCRT in LANPC. Methods: Newly diagnosed patients with LANPC (stage III-IVB according to 7th edition of AJCC/UICC system [TNM-7] and stage III-IVA according to 8th edition [TNM-8) were prospectively recruited from January 2015 to October 2019. They received induction PX (cisplatin: 80mg/m2 on day 1 + capecitabine: 1000mg/m2 twice daily from day 1 to 14 every 3 weeks for 3 cycles) followed by CCRT (cisplatin: 100mg/m2 every 3 weeks for a total of 2-3 cycles concurrent with intensity-modulated radiation therapy [IMRT]). IMRT with doses of 70Gy, 63Gy and 56Gy were delivered to 3 levels of planning target volumes (PTV) (high, intermediate and low risk) respectively and simultaneously in 35 fractions/7 weeks. Tumor response by MRI and CT was evaluated after completion of IC and 16 weeks after completion of CCRT according to RECIST v1.1. All adverse events were graded with NCI CTCAE v4.03. Results: One hundred and forty-five patients were recruited. The stage distributions according to TNM-8 were 82(56.6%) and 63(43.3%) for stage III and IVA, respectively. One hundred and thirty-seven patients completed 3 cycles of induction PX and 122 patients completed IMRT with 2 to 3 cycles of concurrent cisplatin. The median (interquartile range, IQR) tumor regression rates after 2-3 cycles of PX at the nasopharynx (NP) and the neck region (NK) were 51.2% (37.3%-66.5%) and 71.8% (56.7%-81.1%), respectively. At 16 weeks after CCRT, only one patient had residual disease. After a median follow-up of 33 months, 20 treatment failures and 8 deaths were observed. The estimated 2-year progression-free survival (PFS) and overall survival (OS) were 89.8% and 97.2%. The rates of grade 3/4 leukopenia, neutropenia, anemia, nausea/vomiting and electrolyte disturbance during IC were 6.2%, 15.9%, 6.9%, 4.1% and 9.0%, respectively. The corresponding rates were 45.1%, 24.6%, 27.5%, 2.8% and 11.3% during CCRT. Only 1 (0.7%) grade 3/4 hand-foot syndrome and 3 (2.1%) grade 3/4 diarrhea during IC were observed. The rates of grade 3/4 mucositis and dermatitis were 31.0% and 12.7%, respectively. There were no treatment-related deaths. Conclusions: Induction PX followed by CCRT was effective and well tolerated in patients with LANPC. Clinical trial information: NCT03427359

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Abstract Details

Meeting

2021 ASCO Annual Meeting

Session Type

Poster Session

Session Title

Head and Neck Cancer

Track

Head and Neck Cancer

Sub Track

Local-Regional Disease

Clinical Trial Registration Number

NCT03427359

Citation

J Clin Oncol 39, 2021 (suppl 15; abstr 6065)

DOI

10.1200/JCO.2021.39.15_suppl.6065

Abstract #

6065

Poster Bd #

Online Only

Abstract Disclosures