PET CT helps stage testicular cancer, check treatment response and look at leftover masses after chemotherapy. Learn its role and limits in germ cell tumours.
Testicular cancer (germ cell tumour) is highly curable. CT scan of the abdomen, pelvis and chest is the main staging test. PET CT has a special role in seminoma, to decide whether a leftover mass after chemotherapy still contains active cancer and needs treatment. It is less useful for non-seminoma tumours.
How Testicular Cancer Is Managed
It usually starts as a painless lump or swelling in a testicle. Ultrasound confirms a solid mass, blood markers (AFP, beta-hCG and LDH) are measured, and surgery removes the testicle. CT then stages the disease. Treatment may include surveillance, chemotherapy or radiotherapy, with very high cure rates. See ultrasound for gallstones for another ultrasound use, and CT for kidney mass for abdominal CT in cancer.
SituationRole of PET CTInitial stagingCT is standard; PET CT not routineSeminoma with residual mass over 3 cm after chemotherapyPET CT helps decide on surgery or watchingNon-seminoma residual massNot reliable; surgery is often consideredRising markers with normal CTSometimes usefulSurveillanceMostly CT, markers and ultrasoundWhere PET CT Helps in Seminoma
After chemotherapy, a seminoma mass may remain on CT. Often it is scar tissue, but sometimes it hides active cancer. A PET CT done at least 6 weeks after chemotherapy shows whether there is still active disease. A negative PET allows safe watching, and a positive PET prompts further treatment. See PET CT after chemotherapy.
Limits
In non-seminoma tumours, residual masses may contain mature teratoma, which does not take up FDG well, so PET CT cannot reliably exclude it. Scans done too early after chemotherapy can give false positives from inflammation. Because testicular cancer affects young men and scans are repeated, radiation is minimised, and ultrasound and MRI are used where possible.
Preparation
Fast for 4 to 6 hours, keep blood sugar controlled and avoid strenuous exercise the day before. Tell the staff about chemotherapy dates, surgery and fertility concerns. Bring operation notes, marker results and previous scans. See PET CT preparation.
Fertility and Follow-Up
Before treatment, sperm banking is offered to preserve fertility. After treatment, regular follow-up with examination, tumour markers and imaging continues for years. Cure rates are high even for advanced disease, and most men return to normal life. Self-examination of the remaining testicle monthly is advised.
A Practical Example
Aman, 31, had a seminoma removed and received chemotherapy for spread to abdominal nodes. A 4 cm mass remains on CT. A PET CT after 8 weeks shows no active uptake, so his team chooses regular watching, avoiding extra surgery. A scan a few months later confirms that the mass is shrinking.
After the Scan and Next Steps
Take the report to an oncologist or urologist. Keep every follow-up appointment, since cure depends on regular checks and rapid action if markers rise. Avoid smoking, stay active, eat well and seek counselling for emotional and fertility concerns. Report new lumps, back pain, cough or breathlessness early.
Questions to Ask Your Doctor
- Is my residual mass likely scar or active cancer?
- Do I need PET CT or surgery?
- How often will I have markers and scans?
- Have I banked sperm and what is my fertility plan?
Common Mistakes to Avoid
- Doing the PET CT too soon after chemotherapy.
- Skipping tumour marker follow-up.
- Ignoring a lump in the remaining testicle.
Booking, Timing and Report
Ask your doctor for the best timing of the scan. Book a morning slot so that fasting is easier, arrange someone to accompany you, and allow 2 to 3 hours at the centre. Carry biopsy, scan and blood reports and a medicine list. Reports are usually ready within 24 to 48 hours, and images can be given on a CD or digital link for your doctor.
Frequently Asked Questions
Is PET CT used in testicular cancer?
Mainly for seminoma residual masses.
When is the scan done after chemotherapy?
Usually at least 6 weeks later.
Is it useful for non-seminoma?
Less so.
Is testicular cancer curable?
Yes, in most men.
What are tumour markers?
Blood tests such as AFP, beta-hCG and LDH.
Can I have children afterwards?
Many can; discuss sperm banking.
Do I need fasting?
Yes, 4 to 6 hours.
How long does it take?
About 2 to 3 hours.
When is the report ready?
Usually 24 to 48 hours.
Book Your Test at Ganesh Diagnostic
Ganesh Diagnostic & Imaging Centre in Rohini, Delhi offers this test with trained radiology staff and clear reports. You can book an appointment online, check our branches across Delhi NCR, contact us for current rates, or explore all our services. Reports can be downloaded online through our patient portal, so you do not need to make a second trip just to collect them.
This article is for general information only. It does not replace advice from your doctor. Always follow your doctor's instructions for your test.
