Nasopharyngeal carcinoma with paranasal sinus invasion: the prognostic significance and the evidence-based study basis of its T-staging category according to the AJCC staging system

BMC Cancer

Wei Fan³  Xiao Gong¹  Xue-Xia Liang²  Chuan-Miao Xie³  Li-Zhi Liu³  Yun-Xian Mo³  Yi-Zhuo Li³  Li Tian³ 

[1]Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, 74 Zhongshan Road Second, Guangzhou 510080, People’s Republic of China

[2]Department of Radiation Oncology, Sun Yat-sen University Cancer Center

[3] State Key Laboratory of Oncology in South China

[4] Collaborative Innovation Center for Cancer Medicine, 651 Dongfeng Road East, Guangzhou 510060, People’s Republic of China

[5]Imaging Diagnosis and Interventional Center, Sun Yat-sen University Cancer Center

[6] State Key Laboratory of Oncology in South China

[7] Collaborative Innovation Center for Cancer Medicine, 651 Dongfeng Road East, Guangzhou 510060, People’s Republic of China

关键词: Staging;    Prognosis;    Invasion;    Paranasal sinus;    Nasopharyngeal carcinoma;   

Others  :  1118298
DOI  :  10.1186/1471-2407-14-832

 received in 2014-02-08, accepted in 2014-10-30,  发布年份 2014

【 摘 要 】

Background

To evaluate the prognostic significance of paranasal sinus invasion for patients with NPC and to provide empirical proofs for the T-staging category of paranasal sinus invasion according to the AJCC staging system for nasopharyngeal carcinoma.

Methods

The clinical records and imaging studies of 770 consecutive patients with newly diagnosed, untreated, and nondisseminated NPC were reviewed retrospectively. The overall survival, distant metastasis-free survival, and local relapse-free survival of these patients were analyzed using the Kaplan-Meier method, and the differences were compared using the log-rank test.

Results

The incidence of paranasal sinus invasion was 23.6%, with the rate of incidence of sphenoid sinus invasion being the highest. By multivariate analysis, paranasal sinus invasion was shown to be an independent prognostic factor for overall survival, distant metastasis-free survival, and local relapse-free survival (p < 0.05 for all). No significant differences in overall survival, distant metastasis-free survival, and local relapse-free survival were observed between patients with sphenoid sinus invasion alone and those with maxillary sinus and ethmoid sinus invasion (p = 0.87, p = 0.80, and p = 0.37, respectively). The overall survival, distant metastasis-free survival, and local relapse-free survival for patients with stage T3 disease with paranasal sinus invasion were similar to the survival rates for patients with stage T3 disease without paranasal sinus invasion (p = 0.22, p = 0.15, and p = 0.93, respectively). However, the rates of overall survival and local relapse-free survival were better for patients with stage T3 disease with paranasal sinus invasion than for patients with stage T4 disease (p < 0.01, and p = 0.03, respectively).

Conclusions

Paranasal sinus invasion is an independent negative prognostic factor for NPC, regardless of which sinus is involved. Our results confirm that it is scientific and reasonable for the AJCC staging system for nasopharyngeal carcinoma to define paranasal sinus invasion as stage T3 disease.

【 授权许可】

   
2014 Tian et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

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Figure 3.

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