Long-term results of 934 nasopharyngeal carcinoma treated with radiotherapy alone
- VernacularTitle:934例鼻咽癌单纯放疗远期疗效分析
- Author:
Chunyan CHEN
;
Fei HAN
;
Chong ZHAO
;
Lixia LU
;
Shaoxiong WU
;
Taixiang LU
- Publication Type:Journal Article
- Keywords:
Nasopharyngeal neoplasms/radiotherapy;
Conventional radiotherapy;
Prognosis
- From:
Chinese Journal of Radiation Oncology
2008;17(6):411-415
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the long-term efficaey of radiotherapy (RT) alone for nasopharyngnal eareinoma(NPC). Methods 934 NPC patients initially treated by conventional RT alone in 1999 were reviewed retrespeetively, including 676 males and 258 females. According to 92' Fuzhou staging system,there were 35 stage Ⅰ,215 stage Ⅱ ,488 stage Ⅲ and 196 stage Ⅳ diseases. All patients were treated by conventional RT alone with two opposing parallel faeio-eervical fields. The total dose delivered to the nasopharynx was 66-88 Gy. The dose to the cervical lymph nodes was 60-70 Gy, while the prophylactic dose to the neck was 50-56 Gy. Results The median follow-up was 67.1 months. The 5- and 8-year overall survival(OS), disease-free sutural, relapse-free survival and metastasis-free survival rates were 68.30%, 67.3% ,64.4% ,72.4% ,and 48.0% ,66.6% ,50.8% ,68.0% (χ2=49.74, P=0.000), respectively. For stage N1patients,the 5-and 8-year overall survival(OS) ,disease-free survival ,relapse-free survival and metastasis-free survival rates were significantly lower than those of stage NO patients [66.0% : 77.4% and 50.3%:59.8%(χ2=33.34,P=0.000);66.8%:76.1% and 66.1%:76.1%(χ2=29.08,P=0.000); 63.4%:72.9% and 48.9% : 58.7% (χ227.65,P=0.000);71.0%:80.8% and 63.4%:68.0%(χ2=26.13,P=0.000)]. And the corresponding rates of stage N<1-2>were significantly higher than stage N3,while no statistical difference was observed between stage N1 and N2. Multivariate analysis showed that sex, age, pathology,T stage and N stage were independent prognisitie factors for OS. Conclusions Radical RT alone could obtain good long-term results in early stage NPC. Tlowever,OS for local-regionally advanced stage NPC was still unsatisfactory because of the high relapse and metastatic rate. Clinical stage and N stage were valuable prognostic factors.
