It was something called an anaplastic astrocytoma and while the surgery had been successful and the tumor was gone, the microscopic cancerous cells it left behind remained, impossible to remove.

这是一种叫做间变性星形细胞瘤的东西，虽然手术很成功，肿瘤消失了，但它留下的微小癌细胞仍然存在，无法去除。