Other studies have already shown that tumor biology can change. One study, for example, showed that half of cancers change when they spread to the sentinel node.
2
另一方面，越来越多的早期癌症得到诊断，这些早期肿瘤的区域淋巴结转移的可能性很小。
On the other hand, more early-stage cancers with less possibility of regional metastases are diagnosed.
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