[Concomitant chemo-radiotherapy for locoregionally advanced nasopharygeal carcinoma]

To evaluate the efficacy and toxicity of concomitant chemo-radiotherapy (CCRT) followed by adjuvant chemotherapy (ACT) in Chinese patients with locoregionally advanced nasopharygeal carcinoma (NPC).

Seventy-four patients with stage III and IV (UICC1997) were treated by Intergroup 0099 regimen, consisting of CCRT using cisplatin 100 mg/m(2) on D1, 22, and 43 of radiotherapy, followed by ACT using cisplatin 80 mg x m(-2) x d(-1) and 5-Fu 1 g x m(-2) x 4 d(-1) given from D71, 99, and 127. All the patients were irradiated with conventional fractionation to a total dose of 68 Gy to the nasopharynx and 66 Gy to the neck. Acute toxicity and late complication were assessed by the RTOG radiation morbidity scoring scheme.

With a median follow-up of 49 months, the overall 5-year survival and relapse-free survival rates were 71.3% and 43.5% respectively. No grade 5 toxicity was observed in this series, the main grade 3/4 acute toxicity events were hematologic toxicity in 25 patients (33.8%), mucositis in 19 patients (25.7%), and grade 3 skin disease in 6 (8.1%), respectively. The compliance rates were 100.0% for radiotherapy, 75.7% for CCRT, and 47.3% for CCRT plus ACT. The main grade 3/4 late complications were severe salivary gland toxicity (17 cases), ear injury (13 cases), and the neck skin/subcutaneous tissue disease (7 cases). The 5-year cumulative incidence of late toxicity was 44.3%.

Compared with routine radiotherapy, the concomitant chemo-radiotherapy may improve the outcome of locoregionally advanced NPC in the Chinese patients, with higher incidence of severe acute toxicities and similar late complications.