%0 Journal Article %A Akira Sudo %A Tohru Shiga %A Maki Okajima %A Kyoko Takano %A Satoshi Terae %A Yutaka Sawamura %A Akiko Ohnishi %A Kazuo Nagashima %A Shinji Saitoh %T High Uptake on 11C-methionine Positron Emission Tomographic Scan of Basal Ganglia Germinoma with Cerebral Hemiatrophy %D 2003 %J American Journal of Neuroradiology %P 1909-1911 %V 24 %N 9 %X Summary: We herein describe a 12-year-old male patient with a germinoma of the basal ganglia who presented with progressive hemiparesis. MR imaging showed ipsilateral cerebral hemiatrophy predominantly in the left basal ganglia, whereas no mass or enhancement was depicted. Single photon emission CT revealed no significant uptake of thallium, whereas 11C-methionine positron emission tomography showed clearly discernible uptake in the left putamen. Stereotactic biopsy, referencing the results of 11C-methionine positron emission tomography, was performed, allowing histologic verification of germinoma to be established. 11C-methionine positron emission tomography was the only technique that indicated the precise localization of the tumor in our patient and enabled biopsy-based final diagnosis of the basal ganglia germinoma without any overt mass formation. %U https://www.ajnr.org/content/ajnr/24/9/1909.full.pdf