How cancer spreads – Animation Discussion Board › Forums › General Discussion › How cancer spreads – Animation This topic has 0 replies, 1 voice, and was last updated 7 years, 6 months ago by marions. Viewing 1 post (of 1 total) Author Posts June 16, 2017 at 6:29 pm #13461 marionsModerator In metastasis, cancer cells break away from where they first formed (primary cancer), travel through the blood or lymph system, and form new tumors (metastatic tumors) in other parts of the body. https://www.youtube.com/watch?v=fQwar_-QdiQ#action=share Author Posts Viewing 1 post (of 1 total) The forum ‘General Discussion’ is closed to new topics and replies.