Park Eun Suk, Lee Eun Jung, Yun Jung-Ho, Cho Young Hyun, Kim Jeong Hoon, Kwon Do Hoon
Department of Neurosurgery, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.
Department of Neurosurgery, Dongtan Sacred Heart Hospital, College of Medicine, Hallym University, Hwaseong, Korea.
J Korean Neurosurg Soc. 2018 Sep;61(5):592-599. doi: 10.3340/jkns.2017.0303.005. Epub 2018 Aug 31.
OBJECTIVE: Metastatic brain tumors (MBTs) often present with intracerebral hemorrhage. Although Gamma Knife surgery (GKS) is a valid treatment option for hemorrhagic MBTs, its efficacy is unclear. To achieve oncologic control and reduce radiation toxicity, we used a radiosurgical targeting technique that confines the tumor core within the hematoma when performing GKS in patients with such tumors. We reviewed our experience in this endeavor, focusing on local tumor control and treatment-associated morbidities. METHODS: From 2007 to 2014, 13 patients with hemorrhagic MBTs were treated via GKS using our targeting technique. The median marginal dose prescribed was 23 Gy (range, 20-25). GKS was performed approximately 2 weeks after tumor bleeding to allow the patient's condition to stabilize. RESULTS: The primary sites of the MBTs included the liver (n=7), lung (n=2), kidney (n=1), and stomach (n=1); in two cases, the primary tumor was a melanoma. The mean tumor volume was 4.00 cm3 (range, 0.74-11.0). The mean overall survival duration after GKS was 12.5 months (range, 3-29), and three patients are still alive at the time of the review. The local tumor control rate was 92% (tumor disappearance 23%, tumor regression 46%, and stable disease 23%). There was one (8%) instance of local recurrence, which occurred 11 months after GKS in the solid portion of the tumor. No GKS-related complications were observed. CONCLUSION: Our experience shows that GKS performed in conjunction with our targeting technique safely and effectively treats hemorrhagic MBTs. The success of this technique may reflect the presence of scattered metastatic tumor cells in the hematoma that do not proliferate owing to the inadequate microenvironment of the hematoma. We suggest that GKS can be a useful treatment option for patients with hemorrhagic MBTs that are not amenable to surgery.
目的:转移性脑肿瘤(MBT)常伴有脑内出血。尽管伽玛刀手术(GKS)是治疗出血性MBT的一种有效选择,但其疗效尚不清楚。为实现肿瘤控制并降低放射毒性,我们在对此类肿瘤患者进行GKS时采用了一种放射外科靶向技术,该技术将肿瘤核心局限于血肿内。我们回顾了我们在这方面的经验,重点关注局部肿瘤控制和与治疗相关的发病率。 方法:2007年至2014年,13例出血性MBT患者采用我们的靶向技术通过GKS进行治疗。规定的中位边缘剂量为23 Gy(范围20 - 25)。在肿瘤出血后约2周进行GKS,以使患者病情稳定。 结果:MBT的原发部位包括肝脏(n = 7)、肺(n = 2)、肾(n = 1)和胃(n = 1);2例患者的原发肿瘤为黑色素瘤。平均肿瘤体积为4.00 cm³(范围0.74 - 11.0)。GKS后的平均总生存时间为12.5个月(范围3 - 29),在撰写本综述时,有3例患者仍存活。局部肿瘤控制率为92%(肿瘤消失23%,肿瘤缩小46%,病情稳定23%)。有1例(8%)局部复发,发生在GKS后11个月,位于肿瘤实体部分。未观察到与GKS相关的并发症。 结论:我们的经验表明,结合我们的靶向技术进行GKS可安全有效地治疗出血性MBT。该技术的成功可能反映了血肿中存在散在的转移肿瘤细胞,由于血肿微环境不足,这些细胞无法增殖。我们建议,对于不适合手术的出血性MBT患者,GKS可能是一种有用的治疗选择。
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