液氮冷冻治疗老年人口腔良性肿物 ,具有疼痛轻、不出血、不感染、经济、省时等优点。 1 994～ 1 997年我们治疗随访了 3 0 0例 ,疗效好 ,报道如下 :　　一、资料和方法　　老年口腔良性肿物患者 3 0 0例 ,男 1 58例 ,女 1 4 2例 ,年龄 60～ 85岁 ,平均 73 .5岁。病种分布 :乳突 Liquid nitrogen cryogenic treatment of oral benign tumor in the elderly, with pain, no bleeding, no infection, economy, time saving and so on. From 1994 to 1997, we followed up a total of 300 cases with good curative effect and reported the following: 1. Materials and Methods There were 300 elderly patients with oral benign tumor, including 158 males and 142 females, aged 60 ~ 85 years old, an average of 73.5 years old. Disease distribution: mastoid