Treatment outcomes and late toxicities of 869 patients with nasopharyngeal carcinoma treated with definitive intensity modulated radiation therapy: new insight into the value of total dose of cisplatin and radiation boost.

Abstract

This study was to report the long-term outcomes and toxicities of nasopharyngeal carcinoma (NPC) treated with intensity-modulated radiation therapy (IMRT). From 2009 to 2010, 869 non-metastatic NPC patients treated with IMRT were retrospectively enrolled. With a median follow-up of 54.3 months, the 5-year estimated local recurrence-free survival (LRFS), regional recurrence-free survival (RRFS), distant metastasis-free survival (DMFS), disease-free survival (DFS) and overall survival (OS) were 89.7%, 94.5%, 85.6%, 76.3%, 84.0%, respectively. In locally advanced NPC, gender, T, N, total dose of cisplatin more than 300 mg/m(2) and radiation boost were independent prognostic factors for DMFS and DFS. Age, T, N and total dose of cisplatin were independent prognostic factors for OS. Radiation boost was an adverse factor for LRFS, RRFS, DMFS and DFS. Concurrent chemotherapy was not an independent prognostic factor for survival, despite marginally significant for DMFS in univariate analysis. Concurrent chemotherapy increased xerostomia and trismus, while higher total dose of cisplatin increased xerostomia and otologic toxicities. In conclusion, IMRT provided satisfactory long-term outcome for NPC, with acceptable late toxicities. Total dose of cisplatin was a prognostic factor for distant metastasis and overall survival. The role of concurrent chemotherapy and radiation boost in the setting of IMRT warrants further investigation.

• Authors: Xiaomin Ou, Xin Zhou, Qi Shi, Xing Xing, Youqi Yang, Tingting Xu, Chunying Shen, Xiaoshen Wang, Xiayun He, Lin Kong, Hongmei Ying, Chaosu Hu
• Journal: Oncotarget (Oncotarget) Vol. 6 Issue 35 Pg. 38381-97 (Nov 10 2015) ISSN: 1949-2553 [Electronic] United States
• PMID: 26485757 (Publication Type: Journal Article)

Chemical References

• Antineoplastic Agents
• Cisplatin

Topics

• Adolescent
• Adult
• Aged
• Aged, 80 and over
• Antineoplastic Agents (administration & dosage)
• Carcinoma (mortality, secondary, therapy)
• Chemoradiotherapy (adverse effects, methods, mortality)
• Child
• Cisplatin (administration & dosage)
• Disease Progression
• Disease-Free Survival
• Ear Diseases (chemically induced)
• Female
• Humans
• Kaplan-Meier Estimate
• Male
• Middle Aged
• Nasopharyngeal Carcinoma
• Nasopharyngeal Neoplasms (mortality, pathology, therapy)
• Neoplasm Staging
• Proportional Hazards Models
• Radiation Injuries (etiology)
• Radiotherapy Dosage
• Radiotherapy, Intensity-Modulated (adverse effects, methods, mortality)
• Retrospective Studies
• Risk Factors
• Time Factors
• Treatment Outcome
• Trismus (etiology)
• Xerostomia (etiology)
• Young Adult