What should I expect during a PET scan for Endometrial Cancer

Q: What should I expect during a PET scan for Endometrial Cancer

A PET scan positron emission tomography scan is an imaging test that helps your oncology team see how your cancer is behaving at a cellular level. Let me walk you through what this experience typically involves. A PET scan works differently than CT or MRI scans. Instead of just taking pictures of your body's structure, it shows metabolic activity—essentially, where cells are using energy most actively. Cancer cells typically use more glucose sugar than normal cells, so they "light up" on a PET s

Endometrial CancerMay 19, 2026Navis AI

For informational purposes only

This answer was generated by AI grounded in NCCN guidelines and published medical literature. It is not medical advice. Always consult your oncologist or care team before making treatment decisions.

What to Expect During a PET Scan for Endometrial Cancer

A PET scan (positron emission tomography scan) is an imaging test that helps your oncology team see how your cancer is behaving at a cellular level. Let me walk you through what this experience typically involves.

What a PET Scan Does

A PET scan works differently than CT or MRI scans. Instead of just taking pictures of your body's structure, it shows metabolic activity—essentially, where cells are using energy most actively. Cancer cells typically use more glucose (sugar) than normal cells, so they "light up" on a PET scan, making them easier to detect.

According to the NCCN Guidelines for Endometrial Carcinoma, PET/CT imaging (which combines PET with a CT scan) may be considered in select patients to evaluate for metastatic disease (cancer that has spread beyond the uterus), particularly when metastasis is suspected based on your symptoms or clinical findings.

The Procedure: Step-by-Step

Before Your Scan:

You'll receive specific fasting instructions (usually no eating for 4-6 hours before the scan)
Wear comfortable, loose clothing with no metal (zippers, snaps, or underwire are typically okay, but ask your facility)
Arrive 15-30 minutes early for check-in
Let your team know about any medications you're taking

During the Scan:

Injection: A technician will inject a radioactive tracer (usually fluorodeoxyglucose or FDG) into your arm through an IV. This tracer is a glucose molecule tagged with a small amount of radioactivity. You won't feel anything unusual—no heat, no pain.
Waiting period: You'll wait 45-60 minutes in a quiet room while the tracer circulates through your body and accumulates in areas of high metabolic activity. This is a good time to relax, read, or listen to music.
Scanning: You'll lie on a table that slides into a large, donut-shaped machine. The scanner detects the radiation from the tracer and creates detailed images. The scan typically takes 20-30 minutes. You'll need to stay still, but the machine is open on the sides (not like an MRI tunnel), so it's less claustrophobic.
Communication: You can communicate with the technician through an intercom if you need anything.

After Your Scan:

The radioactive tracer leaves your body naturally through urine and sweat over the next 24 hours
You can return to normal activities immediately
Drink extra fluids to help flush the tracer from your system
No special precautions are needed—you're not radioactive in a way that affects others

Why Your Doctor Might Order This

According to NCCN Guidelines, PET/CT may be recommended for:

High-grade endometrial carcinomas to evaluate for metastatic disease
Patients with suspected metastasis based on symptoms or physical exam findings
Recurrent disease evaluation when recurrence is suspected

The scan helps your oncology team determine the stage of your cancer (how far it has spread) and guides treatment decisions.

What the Results Mean

Your radiologist will look for areas where the tracer accumulated more than expected. Increased uptake (accumulation) may suggest cancer, but it can also occur with inflammation or infection. Your oncologist will interpret the results in context with:

Your symptoms
Other imaging (CT, MRI)
Your pathology report
Your clinical exam findings

Important Questions to Ask Your Team

Why is a PET scan being recommended for my specific situation? (staging, recurrence evaluation, etc.)
Will this be a PET/CT combination scan? (This is typically preferred as it provides both metabolic and structural information)
When will I get my results, and who will discuss them with me?
How will these results affect my treatment plan?
Are there any risks I should know about? (The radiation exposure is minimal and considered safe for cancer evaluation)