There are several reputable sources for staying updated on cancer research and breakthroughs. Here are some of them:

1. American Cancer Society (ACS): The ACS provides news and updates on cancer research, including new treatments, prevention strategies, and early detection methods. https://www.cancer.org/

2. National Cancer Institute (NCI): The NCI is part of the U.S. National Institutes of Health and is a leading authority in cancer research. They provide a wealth of information about cancer types, treatments, prevention, and research advances. https://www.cancer.gov/

3. Cancer Research UK: This is one of the world's leading cancer charities dedicated to cancer research. They provide a wide range of information about cancer, including news about the latest research and breakthroughs. https://www.cancerresearchuk.org/

4. American Society of Clinical Oncology (ASCO): ASCO is a professional organization representing physicians of all oncology specialties. They provide patient-friendly information on a wide range of topics, including news on the latest cancer research. Their site, Cancer.Net, is a patient-oriented resource that includes the latest news and research updates.

5. New England Journal of Medicine (NEJM): The NEJM often publishes groundbreaking research in cancer and other diseases. While some of their content is technical, they also provide patient-oriented summaries of their research. https://www.nejm.org/medical-research/cancer

6. Nature Reviews Cancer: This is a highly regarded journal that publishes reviews of recent cancer research. It's a little more technical but is a good source for more in-depth information. https://www.nature.com/nrc/

7. Science Daily - Cancer News: Science Daily provides easy-to-read summaries of the latest research in cancer. https://www.sciencedaily.com/news/health_medicine/cancer/

8. OncoLink: Run by the Abramson Cancer Center of the University of Pennsylvania, OncoLink provides patients and healthcare professionals with resources on various aspects of cancer, including the latest news and breakthroughs in research. https://www.oncolink.org/

While the internet is a great place to find information, not all information found online is reliable or accurate. Always look for information from trusted, reputable sources, and discuss any questions or concerns with your healthcare team.