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자료유형
학술저널
저자정보
Ha, Eun Jin (Neuro-Oncology Clinic, National Cancer Center) Gwak, Ho-Shin (Neuro-Oncology Clinic, National Cancer Center) Rhee, Chang Hun (Department of Neurosurgery, Korea Institute of Radiological and Medical Science) Youn, Sang Min (Department of Neurosurgery, Korea Institute of Radiological and Medical Science) Choi, Chang-Woon (Department of Nuclear Medicine, Korea Institute of Radiological and Medical Science) Cheon, Gi Jeong (Department of Nuclear Medicine, Seoul National University Hospital)
저널정보
대한신경외과학회 대한신경외과학회지 대한신경외과학회지 제54권 제3호
발행연도
2013.1
수록면
175 - 182 (8page)

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Objective : Intracavitary injection of beta-emitting radiation source for control of cystic tumors has been tried with a benefit of localized internal radiation. The authors treated cystic brain tumor patients with Holmium-166-chitosan complex (Ho-166-chico), composed of a beta-emitting radionuclide Holmium-166 and biodegradable chit polymer, and evaluated the safety and effective measurement for response. Methods : Twenty-two patients with recurrent cystic brain tumor and/or located in a deep or eloquent area were enrolled in this pilot study. The cyst volume and wall thickness were determined on CT or MRI to assess radiological response. The activity of Ho-166-chico injected via Ommaya reservoir was prescribed to be 10-25 Gy to the cyst wall in a depth of 4 mm. Results : There was neither complications related to systemic absorption nor leakage of Ho-166-chico in all 22 patients. But, two cases of oculomotor paresis were observed in patients with recurrent craniopharyngioma. Radiological response was seen in 14 of 20 available follow-up images (70%). Seven patients of 'evident' radiological response experienced more than 25% decrease of both cyst volume and wall thickness. Another 7 patients with 'suggestive' response showed decrease of cyst volume without definitive change of the wall thickness or vice versa. All patients with benign tumors or low grade gliomas experienced symptomatic improvement. Conclusion : Ho-166-chico intracavitary radiation therapy for cystic tumor is a safe method of palliation without serious complications. The determination of both minimal effective dosage and time interval of repeated injection through phase 1 trial could improve the results in the future.

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