Follow-Up and Surveillance

Why Is Long-Term Follow-Up Important?

Many cancers are closely monitored for the first five years after treatment. SFT can behave differently.

Some SFTs grow slowly, and recurrence may happen 10, 15, or even 20 years or more after the first treatment.

This doesn’t mean your tumor will return. Many people remain disease-free for years or decades.

It means your care team should consider the possibility of late recurrence when developing your follow-up plan.

Follow-up scans generally look for two things:

Your doctors will also monitor your recovery and any lasting effects from treatment.

An important reminder: A new finding on a scan does not automatically mean your SFT has returned. Scar tissue, inflammation, and other noncancerous changes can sometimes resemble tumors. Your care team may recommend comparing earlier images, repeating a scan, or performing additional tests.

How Often Will I Need Scans?

There is no single follow-up schedule that is right for everyone with SFT.

Your doctors will consider:

• Where your original tumor was located
• Tumor size and pathology findings
• Your estimated risk of recurrence or spread
• Whether the tumor was completely removed
• Treatments you’ve received
• Any previous recurrences or metastatic disease
• Your overall health and personal circumstances

Doctors often recommend closer monitoring during the first few years after treatment, followed by less frequent scans if everything remains stable.

For example, depending on the clinical situation:

These are examples of approaches used in sarcoma care, not a required schedule for SFT.

Patients with lower-risk tumors may need fewer scans. Patients with higher-risk disease, previous recurrences, or tumors involving the brain and spinal cord coverings may need different schedules.

Your specialist should explain why a particular schedule is recommended and when it may change.

This is an especially important question for SFT.

Because late recurrences can occur, many specialists recommend extended surveillance, and lifelong follow-up may be appropriate for some patients.

However, there is still limited research establishing the ideal frequency and duration of imaging for every type of SFT.

Before reducing or stopping scans, discuss the potential benefits and risks with a clinician experienced in SFT.

Which Scans Will I Need?

Different imaging tests are used to examine different parts of the body.

Your scan plan will depend on where your original tumor was located and where recurrence might be expected.

The lungs are one of the more common places where SFT can spread.

For that reason, chest imaging is often part of long-term monitoring, even for people whose original tumor was elsewhere in the body.

Ask your specialist whether chest imaging should be included in your surveillance plan and how often it is needed.

MRI provides detailed images of soft tissues and is particularly useful in the brain, spine, and certain other locations.

CT is often useful for monitoring the lungs, chest, abdomen, and pelvis.

MRI does not use ionizing radiation. CT does, although modern protocols aim to use appropriate radiation doses.

Your care team will consider image quality, your medical history, contrast safety, and cumulative radiation exposure when selecting scans.

Radiologists often determine whether something has changed by comparing your newest scan with previous images.

Whenever possible, make sure your doctors have access to the actual images from earlier scans, especially if they were performed at another hospital.

A written report is helpful, but comparison with the original images may provide important additional information.

Are PET Scans Used for SFT?

You may have heard about PET scans, which use specially labeled substances called tracers to help detect certain types of activity in the body.

PET scans can be useful in selected situations, but they are not routinely required for SFT follow-up.

The most commonly used PET scan is FDG PET/CT, which measures how tissues use glucose.

Some SFTs show strong FDG uptake, while others show relatively little activity, even when tumors are present.

Because of this variability, a negative FDG PET scan does not necessarily rule out SFT.

Researchers are also studying newer imaging methods, including:

FAPI PET

Targets fibroblast activation protein, which may be expressed in SFT. Early studies suggest it may detect tumors that are difficult to see with FDG PET.

DOTATATE PET

Targets somatostatin receptors, which some SFTs express. Its role in SFT remains less established.

These approaches are still being evaluated and are not standard tools for routine SFT surveillance.

If conventional scans are unclear or your disease is difficult to evaluate, your specialist may consider whether another imaging method or research study could be helpful.

Can Blood Tests Detect SFT Recurrence?

At present, there is no validated blood test routinely used to detect SFT recurrence.

Researchers are studying approaches such as liquid biopsy, which looks for tumor-related material circulating in the blood.

This research may eventually improve how patients are monitored. However, some SFTs release very little detectable tumor DNA into the bloodstream.

A negative liquid biopsy result does not reliably exclude active disease.

A small number of patients with SFT develop a condition called Doege-Potter syndrome, in which tumor-related IGF-2 activity causes low blood sugar.

For patients with this condition, doctors may monitor blood glucose and use specialized laboratory tests as part of their evaluation.

These tests are not routinely needed for patients who have no history or symptoms of tumor-related hypoglycemia.

Creating Your Survivorship Care Plan

One of the most useful things you can do after treatment is to ask for a written survivorship care plan.

This document summarizes your diagnosis, treatments, follow-up schedule, and responsibilities for ongoing care.

Because SFT surveillance may continue for many years, a written plan can be particularly valuable.

Ask your oncologist or care team to help create or update this plan.

Keep a copy with your medical records and share it with your primary care doctor and any new specialists.

If you experience recurrence or begin a new treatment, ask for the plan to be updated.

Managing Your Scans and Medical Records

Long-term follow-up can become complicated when care extends across different hospitals, specialists, or years.

A few habits can make the process easier

• Keep copies of your pathology, treatment, and imaging reports.
• Maintain access to previous scan images, especially when changing hospitals.
• Keep a current list of your medications, diagnoses, and treatments.
• Record the date and location of each scan.
• Ask who will order future scans and review the results.
• Confirm your next appointment before leaving the clinic.

When practical, using the same imaging center or consistent imaging protocols may make comparisons easier.

If you receive care locally while consulting a distant sarcoma specialist, ask how images and reports will be shared between the teams.

For more help, see Preparing for a Visit.

Coping With Scanxiety

The days before a scan, and especially the wait for results, can be stressful.

Many people call this feeling scanxiety.

You may feel worried about what the scan will show, even when you’ve been feeling well.

These feelings are common among people living with cancer.

A few things may help:

• Ask when your results will be available and how they’ll be explained.
• Schedule a follow-up conversation with your doctor before the scan, when possible.
• Bring someone with you to the appointment or ask them to be available afterward.
• Make time for activities that help you manage stress, such as walking, exercise, relaxation, or spending time with people you trust.
• Connect with other patients or caregivers who understand the experience.

If scan-related anxiety is interfering with sleep, daily activities, or your willingness to attend appointments, tell your healthcare team. Support from a counselor or oncology social worker may help.

You can find more information in Part 7: Living with SFT.