前頭葉atypical teratoid／rhabdoid tumorの1手術例—SPECT・PETによる多面的解析

Frontal Atypical Teratoid/rhabdoid Tumor Evaluated by Single-photon Emission Computerized Tomography and Positron Emission Tomography

Ⅰ．はじめに

　Atypical teratoid／rhabdoid tumor（AT／RT）はRorkeら^10,11）により提唱された極めて悪性な腫瘍で，乳幼児の後頭蓋窩に好発するとされ^9），今回文献を渉猟した限りでは青年期以降の症例は8例にすぎない^3）．最近，青年期に発症したAT／RTの稀な1例を経験し，SPECT，PETを用いた代謝画像とMRIの画像合成による解析は本症例の治療計画に有用であったので報告する．

A case of frontal atypical teratoicd/rhabdoid tumor (AT/RT) was presented in the findings of single-photon emission computerized tomography (SPECT) using 201Tl-chloride (Tl) and 123I-metaiodobenzylguanidine (MIBG), and positron emission tomography using 18F-fluorodeoxyglucose (FDG) and (11C-methyl)-L-methionine (Met). A 16-year-old female had an episode of Jacksonian seizures one month prior to admission. CT scans showed an isodensity mass with heterogeneous enhancement in the left frontal lobe. MR images revealed a tumor with solid and cystic components and perifocal edema.