BACKGROUND Entrapment of the temporal horn (ETH) is a rare pathologic condition. It is a kind of focal hydrocephalus caused by obstruction of flow pathway of cerebrospinal fluid. It is caused by various conditions, bu...BACKGROUND Entrapment of the temporal horn (ETH) is a rare pathologic condition. It is a kind of focal hydrocephalus caused by obstruction of flow pathway of cerebrospinal fluid. It is caused by various conditions, but ETH secondary to postoperative gamma-knife radiosurgery (GKS) is extremely rare. CASE SUMMARY A 52-year old previously healthy woman underwent resection of a large intraventricular meningioma. A small fragment of residual tumor with no obvious enlargement of the temporal horn was observed 3 mo after surgery, and she was referred for GKS. Two months after GKS, she complained of headache and progressive paralysis of the left limb. Magnetic resonance imaging revealed enlargement of the temporal horn. There was a second procedure to resect the residual tumor 8 mo after GKS. After the second procedure, she recovered smoothly. As of the date of this writing, she has remained in good condition. CONCLUSION This case reminds us that ETH should be considered in the treatment of intraventricular meningiomas, especially before GKS.展开更多
objective: Two groups of rats were microinjected with kainic acid (KA) and irradiated with gam ma knife respectively on unilateral nucleus caudate-putamen to compare the response of astrocytes. Methods: The astrocytes...objective: Two groups of rats were microinjected with kainic acid (KA) and irradiated with gam ma knife respectively on unilateral nucleus caudate-putamen to compare the response of astrocytes. Methods: The astrocytes were identified with anti-GFAP immunohistochemical ABC method and the progress of their reaction to the 2 insults was examined from 3 h to 30 d after the lesion. Results: Both lesions could induce hyperplasia and hypertrophy of astrocytes and 2 types of GFAP-ir cells were found, one with small cell body and thin process, and the other with hypertrophic cell body and thick and long process. The timecourse of GFAP expression in the 2 groups was different. In KA microinjection group, large necrotic area was ob served in the target within 24 h. Three days later, a few astrocytes appeared around the necrosis. With in crease of the survival time, hyperplasia and hypertrophy of astrocytes began to increase. Whereas in gamma knife group, hyperplasia and hypertrophy were evident from 3 h to 7 d and necrotic dots could be seen in the target on day 14. On day 30, necrosis was tnore obvious with gradual variations in GFAP expression around the necrotic area. Conclusion: The above results indicated that GFAP could be used as a marker for CNS in jury; the difference in their timing and distribution pattern suggested different mechanisms in KA microinjec tion group and gamma-knife irradiation group.展开更多
目的探讨颅脑结构性病变所致癫痫的伽玛刀(γ-刀)治疗方法,评价治疗效果及视频脑电图(VEEG)随访的意义。方法回顾性分析山东省戴庄医院伽玛刀治疗科和神经科2017-01—2021-06确诊的60例颅脑结构性病变所致癫痫患者的临床资料,根据是否...目的探讨颅脑结构性病变所致癫痫的伽玛刀(γ-刀)治疗方法,评价治疗效果及视频脑电图(VEEG)随访的意义。方法回顾性分析山东省戴庄医院伽玛刀治疗科和神经科2017-01—2021-06确诊的60例颅脑结构性病变所致癫痫患者的临床资料,根据是否采用γ-刀治疗将其分为单纯药物治疗组(对照组)和γ-刀联合药物治疗组(γ-刀组),每组30例,进行随访观察,分析γ-刀治疗的效果及随访VEEG检测结果。结果在1~2 a的随访期内,γ-刀组患者癫痫总改善率76.67%,对照组为36.67%,差异有统计学意义(P<0.05);γ-刀组EEG痫样放电检出率30.00%,对照组为66.67%;γ-刀组癫痫控制显效组EEG正常率为50%,明显高于有效组的11.11%及无效组的0,显效组EEG痫样波检出率(7.14%)明显低于有效组(22.22%)和无效组(85.71%)。γ-刀治疗后随访期内癫痫发作改善率分别为0.5~1 a 63.33%,>1~2 a 76.67%,>2~3 a 80.77%,3 a以上82.61%;VEEG痫样波检出率分别为0.5~1 a63.33%,>1~2 a 30.00%,>2~3 a 23.08%,3 a以上21.74%。术后并发放射性脑水肿3例(10.00%)。结论γ-刀治疗颅内结构性病变所致的难治性癫痫效果明确,VEEG有助于γ-刀治疗方案的设计、评估治疗效果和指导治疗后用药。展开更多
文摘BACKGROUND Entrapment of the temporal horn (ETH) is a rare pathologic condition. It is a kind of focal hydrocephalus caused by obstruction of flow pathway of cerebrospinal fluid. It is caused by various conditions, but ETH secondary to postoperative gamma-knife radiosurgery (GKS) is extremely rare. CASE SUMMARY A 52-year old previously healthy woman underwent resection of a large intraventricular meningioma. A small fragment of residual tumor with no obvious enlargement of the temporal horn was observed 3 mo after surgery, and she was referred for GKS. Two months after GKS, she complained of headache and progressive paralysis of the left limb. Magnetic resonance imaging revealed enlargement of the temporal horn. There was a second procedure to resect the residual tumor 8 mo after GKS. After the second procedure, she recovered smoothly. As of the date of this writing, she has remained in good condition. CONCLUSION This case reminds us that ETH should be considered in the treatment of intraventricular meningiomas, especially before GKS.
文摘objective: Two groups of rats were microinjected with kainic acid (KA) and irradiated with gam ma knife respectively on unilateral nucleus caudate-putamen to compare the response of astrocytes. Methods: The astrocytes were identified with anti-GFAP immunohistochemical ABC method and the progress of their reaction to the 2 insults was examined from 3 h to 30 d after the lesion. Results: Both lesions could induce hyperplasia and hypertrophy of astrocytes and 2 types of GFAP-ir cells were found, one with small cell body and thin process, and the other with hypertrophic cell body and thick and long process. The timecourse of GFAP expression in the 2 groups was different. In KA microinjection group, large necrotic area was ob served in the target within 24 h. Three days later, a few astrocytes appeared around the necrosis. With in crease of the survival time, hyperplasia and hypertrophy of astrocytes began to increase. Whereas in gamma knife group, hyperplasia and hypertrophy were evident from 3 h to 7 d and necrotic dots could be seen in the target on day 14. On day 30, necrosis was tnore obvious with gradual variations in GFAP expression around the necrotic area. Conclusion: The above results indicated that GFAP could be used as a marker for CNS in jury; the difference in their timing and distribution pattern suggested different mechanisms in KA microinjec tion group and gamma-knife irradiation group.
文摘目的探讨颅脑结构性病变所致癫痫的伽玛刀(γ-刀)治疗方法,评价治疗效果及视频脑电图(VEEG)随访的意义。方法回顾性分析山东省戴庄医院伽玛刀治疗科和神经科2017-01—2021-06确诊的60例颅脑结构性病变所致癫痫患者的临床资料,根据是否采用γ-刀治疗将其分为单纯药物治疗组(对照组)和γ-刀联合药物治疗组(γ-刀组),每组30例,进行随访观察,分析γ-刀治疗的效果及随访VEEG检测结果。结果在1~2 a的随访期内,γ-刀组患者癫痫总改善率76.67%,对照组为36.67%,差异有统计学意义(P<0.05);γ-刀组EEG痫样放电检出率30.00%,对照组为66.67%;γ-刀组癫痫控制显效组EEG正常率为50%,明显高于有效组的11.11%及无效组的0,显效组EEG痫样波检出率(7.14%)明显低于有效组(22.22%)和无效组(85.71%)。γ-刀治疗后随访期内癫痫发作改善率分别为0.5~1 a 63.33%,>1~2 a 76.67%,>2~3 a 80.77%,3 a以上82.61%;VEEG痫样波检出率分别为0.5~1 a63.33%,>1~2 a 30.00%,>2~3 a 23.08%,3 a以上21.74%。术后并发放射性脑水肿3例(10.00%)。结论γ-刀治疗颅内结构性病变所致的难治性癫痫效果明确,VEEG有助于γ-刀治疗方案的设计、评估治疗效果和指导治疗后用药。
文摘目的研究前庭神经鞘瘤放射外科治疗计划中的剂量均匀性指数(homogeneity index,HI)的影响因素,以及HI更简便的替代计算方法。方法回顾性分析301例前庭神经鞘瘤伽玛刀治疗计划,298例病人采用经典单次治疗,3例采用连续低分割治疗。根据国际辐射单位和测量委员会(ICRU)-83标准,计算计划的HI,并评估可能影响HI的因素。计算靶区的剂量变异系数(dose coefficient of variation,Dcv),评估其作为HI替代方案的可行性。结果治疗计划的平均HI为0.60±0.08。单因素分析发现除周边剂量外,所有计划参数与HI的相关性均有统计学意义(均P<0.05)。多因素分析显示:处方剂量线、覆盖率、选择性、梯度指数和靶区体积是有统计学意义的相关因素(均P<0.05)。Dcv可很好拟合HI。结论HI与治疗计划多个参数关系密切。Dcv可试用作为更简便计算HI的替代方法。
