In memory
What Ryan O'Neal's Story Can Help Us Understand About Chronic Myeloid Leukemia
The actor lived openly with chronic myeloid leukemia for more than two decades before his death in 2023. Here is what that diagnosis means, explained calmly.
Please note: this page is educational only — it is not medical advice, and it does not speculate about anyone’s health beyond reliable public reporting. For questions about your own health, talk with your healthcare team.
In the news
Ryan O'Neal, the actor known for Love Story, Paper Moon, and Barry Lyndon, died in December 2023 at age 82. Over the years he had spoken publicly about living with chronic myeloid leukemia, which he shared he was diagnosed with in 2001, and he later disclosed a prostate cancer diagnosis in 2012. Reporting after his death indicated his cause of death was congestive heart failure related to a longstanding heart condition, rather than cancer.
We share his publicly disclosed health history with respect, and note plainly that his death was not attributed to cancer.
The reality
According to the National Cancer Institute, leukemia is a broad term for cancers of the blood cells, and the type depends on which blood cell becomes cancer and whether the disease grows quickly or slowly. Chronic myeloid leukemia (CML), also called chronic myelogenous leukemia, is described by NCI as a slowly progressing blood and bone marrow disease in which the bone marrow makes too many white blood cells. It usually occurs during or after middle age.
NCI notes that most people with CML have a specific gene change called the Philadelphia chromosome. Signs and symptoms can include weight loss and tiredness, and tests of the blood and bone marrow are used to make the diagnosis. Because CML often progresses slowly, many people live with it over long periods.
What the story gets right — and what to remember
Mr. O'Neal's experience of living openly with leukemia for more than twenty years reflects something true about certain slow-growing blood cancers: they can be long-term conditions that people manage over many years. His story is also a reminder that people can live with more than one health condition at once. Every person's situation is different, and one experience is not medical advice or a prediction for anyone else.
Awareness, screening & prevention
NCI states that it does not have PDQ evidence-based information about screening or prevention for leukemia. There is no routine screening test for it in people at average risk. Because there is no screening program, it is worth bringing persistent, unexplained symptoms — such as ongoing fatigue or unexplained weight loss — to a healthcare professional. If you would like a calm overview of the screenings that are recommended for your age and history, including for cancers that do have screening tests, our free screening check-up tool is a gentle place to begin.
Turning a story into something useful
Remembering someone through learning is a quiet way to honor their story. Understanding what chronic myeloid leukemia is, knowing that some blood cancers are managed over years, and recognizing that survivorship and support are real parts of care are calm, useful takeaways. Supporting free, trustworthy cancer education helps make that information available to others.
Questions to ask a healthcare team
- Which type of leukemia is being discussed, and does it tend to grow slowly or quickly?
- What tests of the blood and bone marrow help confirm the diagnosis?
- What does living with a long-term blood cancer involve day to day?
- What emotional and practical support is available for me and my family?