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Table 3. Japanese Pediatric Brain Tumor Study Group Classification

Prognostic Group  Tumor Type 
GoodGerminoma, pure
Mature teratoma
IntermediateGerminoma with syncytiotrophoblastic giant cells
Immature teratoma
Mixed tumors mainly composed of germinoma or teratoma
Teratoma with malignant transformation
Embryonal carcinoma
Mixed tumors composed of choriocarcinoma, yolk sac tumor, or embryonal carcinoma
Yolk sac tumor