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Recurrent High-grade Astroblastoma Treated with Stereotactic Radiotherapy:A Case Report Shinya HIGUCHI 1,2 , Yu KAWANISHI 1,3 , Yuichiro KONDO 1,2 , Eiichi NAKAI 1 , Hitoshi FUKUDA 1 , Naoki FUKUI 1 , Takahito NAKAJO 1,3 , Kana KOBAYASHI 4 , Ichiro MURAKAMI 5 , Tetsuya UEBA 1 1Department of Neurosurgery, Kochi Medical School 2Department of Neurosurgery, Chikamori Hospital 3Department of Neurosurgery, Aki General Hospital 4Department of Radiology, Kochi Medical School 5Laboratory of Diagnostic Pathology, Kochi Medical School Hospital Keyword: astroblastoma , 11C-methionine positron emission tomography , stereotactic radiotherapy pp.151-158
Published Date 2020/2/10
DOI https://doi.org/10.11477/mf.1436204152

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 INTRODUCTION:Astroblastoma is a rare, supratentorial glial tumor, occurring predominantly in children and young adults. However, treatment strategies have not yet been established for this rare disease.

 CASE PRESENTATION:A 6-year-old boy presented with headache and nausea. CT and MRI revealed a left frontal mass lesion with slight edema and macrocalcifications. Gross tumor resection was performed. Histological examination found neoplastic cells with astroblastic characteristics, and a striking perivascular array of pseudorosettes. The final diagnosis was high-grade astroblastoma. MRI 13 months after surgery suggested local recurrence, and an enlargement was found 3 months later. Stereotactic radiotherapy(SRT)was performed. MRI after SRT showed enhanced cyst formation around the tumor bed, suggesting tumor recurrence. However, 11C-methionine positron emission tomography(PET)revealed radiation necrosis. The last follow-up MRI 15 months after SRT showed no further recurrence.

 CONCLUSION:Astroblastoma is rare, therefore, no optimal management is known. SRT may be effective to treat recurrent astroblastomas. 11C-methionine PET/CT was useful to differentiate metastatic disease from radiation necrosis.


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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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