This research study is for people who have been part of **Children's Oncology Group (COG) studies**. The goal is to follow patients over time to see how they are doing after cancer treatment. This helps doctors understand how treatments affect patients in the long run and find ways to make life better for them.

Key Points:

• The study involves updating your health status once a year. You can do this online, by mail, or by phone.
• You must live in the U.S. and agree to participate by signing a consent form.
• Participants help doctors learn more about the effects of cancer treatments, potentially improving future care.

After joining the study, you'll get a packet from the Long-Term Follow-Up Center (LTFC) with a form to fill out about your health and contact details. This will help keep your information updated. You can return the form using a prepaid envelope, online, or by calling a toll-free number. The LTFC will check in with you every year to see how you're doing.