125I粒子腮腺区组织间近距离治疗对面神经功能恢复的影响

目的 研究¹²⁵I粒子腮腺区组织间近距离治疗对面神经功能恢复的影响。方法 对无面瘫的21例腮腺原发癌患者,采用外科手术切除(保存面神经),术后1周行¹²⁵I放射性粒子腮腺区组织间治疗,粒子活度24.05×10⁶~25.9×10⁶ Bq,处方剂量60 Gy。应用House-Brackmann(HB)评价系统和面神经肌电图对患者分别进行主观评价和客观评价,随访时间4年。按照面神经功能分区评价的方法,以神经传导潜伏时为指标,将患侧面神经分为异常组和正常组,分别与健侧相应面神经分支进行比较。结果 所有患者术后均出现不同程度面瘫,随访术后6个月内均恢复至术前正常水平;面神经患侧异常组与健侧对应神经分支传导潜伏时的差异在术后1周至术后6个月具有统计学意义( t= 2.362, P= 0.028),患侧较健侧明显延长,而术后1~4年差异无统计学意义;面神经患侧正常组与健侧对应分支神经传导潜伏时的差异在术后1周具有统计学意义( t=2.522, P=0.027 ),患侧较健侧延长,而术后2月~4年差异无统计学意义。结论 ¹²⁵I 粒子组织间近距离治疗不影响腮腺癌术后面神经功能的临床恢复,对面神经无迟发损害。

Influence of 125I seed interstitial brachytherapy on recovery of facial nerve function

Objective To study the influence of ¹²⁵I seed interstitial brachytherapy in parotid region on the recovery of facial nerve function. Methods A total of the data of 21 patients with primary parotid carcinoma were treated with resection and ¹²⁵I interstitial brachytherapy. All the patients had no facial palsy before operation and the prescribed dose was 60 Gy. During 4 years of follow-up, the House-Brackmann grading scales and ENoG were used to evaluate the function of facial nerve. According to the modified regional House-Brackmann grading scales, the facial nerve branches of patients in affected side were divided into normal and abnormal groups, and were compared with those in contra-lateral side. Results Post-operation facial palsy occurred in all the patients, but the facial palsy recovered within 6 months. The latency time differences between affected side and contralateral side were statistically significant in abnormal group from 1 week to 6 months after treatment( t =2.362, P =0.028), and were also different in normal group 1 week after treatment( t =2.522, P =0.027). Conclusions ¹²⁵I interstitial brachytherapy has no influence on recovery of facial nerve function after tumor resection and no delayed facial nerve damage.