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Advances in cancer early detection and treatment mean that more and more people are surviving cancer. Some survivors may live cancer free for the remainder of their life after treatment, but others may be affected by a number of non-cancer related problems and treatment side effects.
Often, a cancer survivor's greatest concern is facing cancer again . It's important for all cancer survivors to know it's possible to get another (new) cancer, even after surviving the first. This is called a second cancer.
A second cancer is a new cancer that's unrelated to any previous cancer diagnosis. It's a completely different type of cancer.
Because it can take many years for cancers to develop, second cancers have been studied in types of cancers for which successful treatments have been around the longest. That’s why we know more about certain second cancers than others.
It isn’t always clear what causes a second cancer or who is most at risk. Some second cancers seem to have the same or similar risk factors as a first cancer. But, the risk is known to be higher for people with certain types of cancer, who had certain types of cancer treatment, or if they have a family cancer syndrome. But for other people, the risk for a second cancer may be lower or simply isn't known.
Risk factors for a second cancer include some of the same things that are a risk for a first cancer: a healthy lifestyle and environment, using tobacco products, family history and genetics, being overweight or obese, drinking too much alcohol, or the lack of good follow-up care or cancer screening after a first cancer.
When you have a first cancer can matter too. For example, survivors of childhood cancers can develop second cancers from some effects of treatment or because of hereditary or genetic problems. And, because a person's risk for cancer generally goes up as they age, an unrelated new cancer may develop later in a cancer survivor's life.
Sometimes there are specific lifestyle recommendations and monitoring needed if a person has certain non-cancer health problems that might affect them after treatment. There might also be specific cancer screening guidelines based on a person's level of risk or if they have a family cancer syndrome. But, in general, the same cancer screening guidelines should be followed as for people who have not had cancer.
Our team is made up of doctors and oncology certified nurses with deep knowledge of cancer care as well as journalists, editors, and translators with extensive experience in medical writing.
American Cancer Society (ACS). Cancer Facts & Figures 2020. Atlanta, GA: American Cancer Society; 2020.
American Cancer Society (ACS). Cancer Prevention and Early Detection Facts & Figures, 2019-2020. Atlanta, GA: American Cancer Society; 2019.
American Cancer Society (ACS). Cancer Treatment and Survivorship Facts & Figures 2019-2021. Atlanta, GA: American Cancer Society; 2019.
Division of Cancer Epidemiology and Genetics (NIH). Second primary cancers. Accessed at https://dceg.cancer.gov/research/what-we-study/second-cancers on September 19, 2019.
Fung C, Bhatia S, Allan JM, et al. Second cancers. In DeVita VT, Lawrence TS, Rosenberg SA, eds. DeVita, Hellman, and Rosenberg’s Cancer: Principles and Practice of Oncology. 11th ed. Philadelphia, PA: Lippincott Williams & Wilkins; 2019:2155-2173.
National Comprehensive Cancer Network (NCCN). Clinical practice guidelines: Survivorship. Version 2.2019. Accessed at www.nccn.org on January 6, 2020.
Rowland, JH, Mollica, M, Kent EE. Survivorship. In Niederhuber JE, Armitage JO, Kastan MB, Doroshow JH, Tepper JE, eds. Abeloff’s Clinical Oncology. 6th ed. Philadelphia, PA: Elsevier; 2020:732-740.
Last Revised: February 1, 2020
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