What should I ask before a cancer scan or test?

Before a cancer test or scan, the National Cancer Institute suggests starting with the basics: why the test is needed and what your care team is looking for. This helps you understand the purpose, whether it's part of an initial diagnosis or part of monitoring an existing treatment plan.

Preparation questions matter too. Ask how you should prepare — including anything about eating, drinking, or medicines beforehand — and whether the test involves contrast dye, since some imaging tests use it and preparation can differ as a result. It's also reasonable to ask how long the test will take, so you can plan your day around it.

For results, ask when and how you'll receive them, and who will actually explain what they mean. Results sometimes appear in a patient portal before a doctor has reviewed them, and normal ranges can vary from person to person, so a number alone doesn't always tell the full story.

Finally, ask whether you're likely to need repeat testing, since a single test alone usually can't confirm a diagnosis or fully monitor how treatment is working.