Objective: the current study was designed to analyze causes of treatment failure after primaryradiotherapy in patients with nasopharyngeal carcinoma (NPC).
目的：研究鼻咽癌放射治疗失败原因，为制定鼻咽癌治疗策略提供依据。
2
OBJECTIVE:To evaluate the clinical value of hyperfractionated external irradiation followed by 3D conformal radiation therapy boost to recurrent NPC after primaryradiotherapy.
目的：初步评价超分割外照射加立体定向适形放射剂量治疗局部复发鼻咽癌的临床疗效及毒副反应。
3
Objective To discuss the therapeutical effect of stereotactic conformal radiotherapy on primary liver cancer and its value in preoperative application.