八、松果体区肿瘤松果体区肿瘤占儿童中枢神经系统肿瘤的0.4%～2%，包括生殖细胞肿瘤（40%～65%）、松果体实质细胞瘤（17%）和星形细胞瘤（15%）；其中生殖细胞肿瘤又可分为生殖细胞瘤、畸胎瘤和混合型生殖细胞肿瘤。
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