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  1. Metastatic Cancer: When Cancer Spreads - NCI - National Cancer …

  2. What is Metastasis? | Cancer.Net

  3. What Is Metastasis? (Stage IV, Metastatic or Secondary Cancer)

  4. Metastatic Cancer: Overview, Symptoms, and Outlook - Healthline

  5. Metastasis - Wikipedia

  6. Metastatic cancer: What happens when cancer spreads?

  7. Understanding Advanced and Metastatic Cancer

  8. Metastatic and Metastasized Cancers: Answers to 7 Common …

  9. Molecular principles of metastasis: a hallmark of cancer …

  10. Metastasis - NCBI Bookshelf