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Learn About Cancer of Unknown Primary

Whether you’re worried about developing a cancer of unknown primary, making decisions about treatment, or trying to stay well after treatment, we can help. Find information in our Detailed Guide.

Cancer of Unknown Primary Treatment and Support

If you are facing a cancer of unknown primary, we can help you learn about your treatment options and possible side effects, and point you to information and services to help you get through treatment and live well afterward.

Explore Research

The American Cancer Society is committed to relentlessly pursuing the answers that will save lives from cancers of unknown primary. In fact, the Society has been a part of nearly every major cancer research breakthrough in recent history. 

Get Involved

You can make a difference in the fight against cancer by volunteering your time, participating in an event, or donating to the cause. Find out about all the ways you can get involved today. 

Online Support Communities

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Facing a cancer of unknown primary?  Connect with patients, survivors, and caregivers through the American Cancer Society's online communities, including WhatNext and Cancer Survivors Network.