We investigated a new chemoradiotherapy (CRT) regimen for locoregionally advanced nasopharyngeal carcinoma (NPC). A total of 240 patients were randomly assigned to three different CRT regimens: sequential CRT [1 cycle chemotherapy 1 Phase I radiotherapy (RT) 1 1 cycle chemotherapy 1 Phase II RT 1 2 cycles chemotherapy] with a cisplatin-gemcitabine (GC) regimen weeks) (sPF-RT) and cisplatin-based concurrent chemoradiotherapy plus adjuvant PF chemotherapy (Con-RT 1 PF). The complete response rate was higher in the sGC 1 RT group than in the other two groups (98.75% vs. 92.50%, p < 0.01). The 3-year overall survival (OS), disease-free survival (DFS) and distant metastasis-free survival (DMFS) rates in the sGC-RT group were significantly higher than those observed in the Con-RT group (OS, 95.0% vs. 76.3%, p < 0.001; DFS, 89.9% vs. 67.5%, p < 0.001; DMFS, 92.5% vs. 76.0%, p 5 0.004) and in the sPF 1 RT group (OS, 95.0% vs. 73.6%, p < 0.001; DFS, 89.9% vs. 63.3%, p < 0.001; DMFS, 92.5% vs. 74.7%, p 5 0.002). There were no significant differences in 3-year OS, DFS and MFS rates between the Con-RT and the sPF-RT groups. The GC-RT group experienced more hematologic toxicity, constipation and rash; however, there were no differences in late RT toxicity between the groups. These results demonstrate that a sGC-RT regimen is effective and well tolerated in patients with locoregionally advanced NPC.
Nasopharyngeal carcinoma (NPC) is endemic in SoutheastAsia, especially in the southern provinces of China. 1 Furthermore, between 63.3 and 68.1% of patients with NPC present with Stage III or IV disease in southern China.2,3 Patients with locoregionally confined advanced NPC have a worse prognosis, with frequent local relapse and distant metastases. In recent years, local tumor control for NPC has been greatly improved by developments in radiotherapy (RT) techniques; however, the incidence of distant metastases remains high, and further research is needed to address this. 4 NPC is known for its high rates of response to RT and chemotherapy. The results from the Intergroup-0099 trial, which compared concurrent chemoradiotherapy (Con-RT) plus adjuvant chemotherapy with RT alone in patients to Stages III-IVB disease, suggest that the addition of chemotherapy to RT is beneficial.5 However, a randomized trial in endemic geographic areas showed that the Intergroup-0099 regimen only improved relapse-free survival and not overall survival (OS) or distant metastasis-free survival (DMFS). Additionally, the Intergroup-0099 regimen resulted in significantly increased toxicity rates.7 Therefore, an exploration of new therapies and regimens that improve outcome and decrease treatment-related toxicity in locoregionally confined advanced NPC is needed.