english: And once those vessels invade the cancer, it can expand, it can invade local tissues, and the same vessels that are feeding tumors allow cancer cells to exit into the circulation as metastases.
non_english: Ko krvne žile prodrejo v tumor, se ta lahko razširi in napade sosednja tkiva. Krvne žile, ki hranijo tumor, mu tudi omogočijo vstop v krvni obtok v obliki metastaz.