PT - JOURNAL ARTICLE AU - Sudo, Akira AU - Shiga, Tohru AU - Okajima, Maki AU - Takano, Kyoko AU - Terae, Satoshi AU - Sawamura, Yutaka AU - Ohnishi, Akiko AU - Nagashima, Kazuo AU - Saitoh, Shinji TI - High Uptake on <sup>11</sup>C-methionine Positron Emission Tomographic Scan of Basal Ganglia Germinoma with Cerebral Hemiatrophy DP - 2003 Oct 01 TA - American Journal of Neuroradiology PG - 1909--1911 VI - 24 IP - 9 4099 - http://www.ajnr.org/content/24/9/1909.short 4100 - http://www.ajnr.org/content/24/9/1909.full SO - Am. J. Neuroradiol.2003 Oct 01; 24 AB - 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.