The invasion and spread of cancer cells to other parts of the body, known as metastasis, is a principal cause of death in patients diagnosed with breast cancer.
在诊断为乳腺癌的病人中，癌细胞侵袭与扩散至身体的其他部位（即转移）是导致病人死亡的主要原因。
The process of metastasis or cancer spread is still much of a mystery to scientists.
对科学家来说，癌症的转移过程至今仍是一个谜。
Objective: to study the relationship between different patterns of invasion and extracapsular spread in lymph node metastasis from squamous cell carcinoma of tongue.
目的：探讨舌癌不同浸润方式与颈淋巴结转移癌包膜外侵犯间的关系及其临床意义。
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