Based on the information you provided, a PET scan may not be necessary for a survivor who has been in remission for 10 years without any symptoms and has been getting regular check-ups. PET scans are typically recommended when there is a suspicion of cancer recurrence or progression, or when there are new symptoms or abnormalities that need further investigation.In this case, since the individual has been in remission for a long period of time and has been undergoing regular check-ups without any concerning findings, it is possible that a PET scan may not be needed at this time. However, I would recommend discussing this with the oncologist or healthcare provider who has been following their case closely. They can provide personalized guidance based on the individual's medical history, risk factors, and current health status.It is important to continue attending regular follow-up appointments and screenings as recommended by the healthcare provider to monitor for any changes and ensure early detection of any potential issues. If there are any new symptoms or concerns that arise between appointments, it is important to report them promptly to the healthcare provider for further evaluation.