很多罕见的遗传性因素使得儿童的大脑中也累积了大量细胞毒素，如果不加以治疗，就会导致神经类疾病甚至死亡。
Dozens of rare genetic conditions affecting children lead to the buildup of cellular toxins, which without treatment can cause neurological problems and sometimes death.
这种变异是遗传性神经母细胞瘤发病的最根本原因，和死亡率很高的非遗传性神经母细胞瘤也密切相关。
The mutations are the primary drivers behind the inherited form of the disease, and are also strongly associated with a non-inherited form that carries a particularly high risk of death.
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