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ACS & ASCO are Stronger Together: Cancer.Net content is now available on cancer.org.

 

Cancer of Unknown Primary Causes, Risk Factors, and Prevention

Learn about the possible risk factors for cancer of unknown primary.

Risk Factors

Since the exact type of cancer is not known, it’s hard to identify factors that might affect risk. But research has provided some information about possible risk factors for these cancers.

Prevention

Even though the origin of this cancer is unclear, certain lifestyle changes may help to reduce your risk.