Informed Consent

Informed consent is defined as the permission a patient gives a doctor to perform a test or procedure after the doctor has fully explained the purpose. Learn more.
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Research policy

Your signature on this form implies that you know the risks of refusing, so be sure that you understand these risks and know your other options before you sign. The American Cancer Society medical and editorial content team Our team is made up of doctors and master's-prepared nurses with deep knowledge of cancer care as well as journalists, editors, and translators with extensive experience in medical writing.

May 20, Last Revised: For reprint requests, please see our Content Usage Policy.

Informed Consent What is informed consent and what does it mean? Why does the doctor need me to sign a consent form? What are the legal requirements of informed consent? Who besides the patient is allowed to consent?


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Are there times when the usual consent requirements do not apply? How will I be given information for informed consent? What questions should I ask during informed consent?


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How is informed consent for a clinical trial or research study different from consent for standard treatment? How is shared decision-making different from informed consent? How can I find out more? What is informed consent and what does it mean?

Informed consent

Informed consent is a process that includes all of these steps: You are told or get information in some way about the possible risks and benefits of the treatment. You are told about the risks and benefits of other options, including not getting treatment. You have the chance to ask questions and get them answered to your satisfaction. You have had time if needed to discuss the plan with family or advisors.

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Definition of Informed consent

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