放疗是控制头颈部癌的有效方法 ,然而由于辐射引起的组织缺氧、血管分布减少、细胞生成减少可导致组织崩解及慢性不愈性创伤 ,甚至发生放射性骨坏死。该文报告 1993～ 1998年初步诊断为放射性骨坏死 33例 ,诊断标准为放射治疗后皮肤或粘膜出现溃疡并有坏死的骨质暴露 ,或死骨处 Radiotherapy is an effective method to control head and neck cancer. However, radiation-induced tissue hypoxia, reduced vascular distribution, and reduced cell production can lead to tissue disintegration and chronic healing, and even osteonecrosis. This article reported 33 cases of initial diagnosis of radioactive osteonecrosis from 1993 to 1998. The diagnostic criteria were: skin or mucous membrane ulceration with necrotic bone exposure after radiation therapy, or