Both of these proteins, are tumor suppressors, meaning they help slow down cell growth and prevent tumors.

这些蛋白都是肿瘤剂，辅助胞生长，阻止肿瘤发生。

So oncogenes or mutated tumor suppressor genes allow cells to keep growing uncontrollably resulting into tumors.

因此，基因或突变的基因使胞不受控地增长，导致肿瘤发生。

This happens either because the cancer brought that property with it, like SCLC, or because the brain environment forces a change, like in TMBC, turning into an immune desert.

这可能是因为症本身带有这种特性，例如小胞（SCLC），可能是由于大脑环境迫使肿瘤发生改变，例如在三阴性乳腺（TMBC）中，使其转变为免疫沙漠状态。

Thus, tumors of mature muscle or nerve cells do not occur, although tumors of less differentiated myoblastic or neuronal stem cells do.

因此，尽管有肿瘤发生在分化程度较低的成肌胞或神经干胞，但不会发生成熟肌肉或神经胞的肿瘤。