Kanglaite Reduce the Toxicity of Radiotherapy of Head and Neck Cancer Phase II Study

3-4 grade radiation mucositis account for 34%-56% in all head and neck patients treated by radiotherapy and \>50% in patients treated by radiotherapy concurrent with chemotherapy. 3-4 grade radiation mucositis have obvious symptoms, presenting with fusion ulcers, ulcers bleeding or obvious pain need analgesic drugs. At this time, the patients can not eat or can only intake fluid diet, which led to weight loss, malnutrition, quality of life declined and a series of problems. Kanglaite has anti-tumor effect and reduce treatment toxicity of tumor. Kanglaite can reduce radiotherapy mucositis of nasopharyngeal cancer had been found initially in Chinese. Kanglaite on the prevention and treatment of radiation mucositis of the head and neck malignant tumor is still lack of strong clinical trial evidence. This is a phase II, single center, one arm study with subject to evaluation the acute radiation mucositis, nutritional status, and quality of life on the course of radiotherapy of head and neck malignant tumors. Kanglaite 200ml is injected intravenous from the first day to the last day of radiotherapy. Chemotherapy with cisplatin or nedaplatin (both 80-100mg/m2, 21 day per cycle, 1-3 cycles) is used or not concurrent with radiotherapy. There is no order of Kanglaite injection and radiotherapy. Granulocyte colony stimulating factor and antibiotics have no prophylactic use, but can be used after the decline of white blood cells. Mucositis, nutritional status, and quality of life are evaluated before radiotherapy, every week of radiotherapy, 4 weeks after radiotherapy. Mucositis is verified by physical examination. Nutritional status is evaluated by patient-generated subjective global assessment (PG-SGA) scale. Quality of life is evaluated by EORTC QLQ-C30 and QLQ-H\&N35 questionnaire. This is a one arm study, sample size calculation based on the incidence of 3-4 degree mucositis. The incidence of 3-4 degree mucositis is about \>50% according to literatures of head and neck squamous cell carcinoma intensity modulated radiation therapy concurrent with chemotherapy. So we assume that Kanglaite can reduce 3-4 degree mucositis from 50% to 30%. The sample size required 44 cases according to the superiority test, bilateral Class I error α = 0.05, class II error β = 0.2. Total 49 cases are need, assuming the off rate of 10%.