[名词解释] 未分化癌(undifferentiated carcinoma)

脊髓丘脑束（） ["由同侧脊神经节细胞中枢突构成","由对侧脊神经节细胞中枢突构成","由对侧后角细胞轴突构成","由同侧后角细胞轴突构成","终止于背侧丘脑腹后外侧核"] 浸润性生长(invasive growth) 癌症(cancer) 症状表现在病灶的同侧是因损伤了（） ["A．脊髓丘脑束","B．三叉丘系","C．内囊后肢","D．内侧丘系","E．薄束、楔束"] 畸胎瘤(teratoma) 未分化癌(undifferentiated carcinoma)