Episode Summary

In this episode, We explain an imaging test called fluorodeoxyglucose positron emission tomography and computed tomography. Many people call it a glucose positron emission tomography and computed tomography scan. This test is used to look for cancer in many parts of the body and is especially helpful in certain urologic cancers other than prostate cancer, such as bladder cancer, kidney cancer, testicular cancer, and cancers of the upper urinary tract.

Who This Episode Is For

• Patients with bladder cancer who are being checked for spread to lymph nodes or distant organs
• Patients with kidney cancer who may have disease outside the kidney or unclear findings on other scans
• Patients with testicular cancer, especially those with remaining masses after chemotherapy
• Patients with less common urinary tract cancers who need more information about possible spread
• Family members and caregivers who want a clear, plain language explanation of this scan

What You Will Learn

• What urologic cancers are, including bladder, kidney, testicular, and upper urinary tract cancers, and how they can spread
• What a fluorodeoxyglucose positron emission tomography and computed tomography scan is and how it combines two imaging methods in one test
• How the fluorodeoxyglucose sugar based tracer works and why cancer cells often show up as bright spots on the scan
• When your urologist or oncologist may recommend this scan, such as staging at diagnosis, checking for recurrence, or clarifying unclear findings on other imaging
• How the scan is used differently in bladder cancer, kidney cancer, and testicular cancer
• How to prepare for the scan, including fasting, drinking water, and avoiding heavy exercise or sugary foods before the test
• What happens step by step on the day of the scan, from check in to tracer injection, resting period, and time in the scanner
• The main benefits of this scan, including whole body imaging and help in monitoring response to treatments
• The possible risks and limitations, including radiation exposure, possible side effects from the injection, and the chance of false positive or false negative results
• How your doctors interpret the scan and use the information to guide your treatment plan and follow up schedule

Key Takeaways

• A fluorodeoxyglucose positron emission tomography and computed tomography scan uses a small amount of a radioactive sugar like tracer to find active cancer cells in many parts of the body.
• This scan is especially helpful for checking whether bladder, kidney, testicular, or other urologic cancers have spread beyond the original site.
• In bladder cancer, the scan is most useful for looking outside the bladder, because the tracer collects in urine and makes the bladder itself appear very bright.
• In kidney and testicular cancers, the scan helps evaluate lymph nodes and distant organs and can help show whether remaining masses after treatment are active cancer or scar tissue.
• Preparation is important. You are usually asked not to eat for several hours, to drink water, and to avoid heavy exercise and very sugary foods before the test.
• The test involves a simple injection, a quiet rest period, and then lying still on a table while pictures are taken. Most patients tolerate it well.
• The scan gives your care team valuable information that can help choose between surgery, radiation, systemic treatments such as chemotherapy or immunotherapy, or careful observation.
• The results are always considered together with your symptoms, physical exam, blood tests, and other scans to create a complete and personalized plan.