Rare gynaecological cancer
PET-CT in — Gestational Trophoblastic Disease
Gestational trophoblastic disease is rare, and it behaves differently from most other cancers because a blood marker — HCG — tracks disease activity so reliably that conventional imaging covers most situations without a PET-CT. When your team recommends one, there is a specific clinical reason.
Medically reviewed by Dr. T. Raghavender Reddy, Medical Oncologist, MBBS · DM (Medical Oncology) · MD (Radiation Oncology) · Last reviewed September 2026
- HCG does most of the monitoring — In most GTD types, the blood marker HCG is more sensitive than any scan for detecting whether disease is active.
- PET-CT is selective, not routine — Guidelines from FIGO and ESMO do not list PET-CT as a standard step for most gestational trophoblastic disease.
- Specific situations change that — Drug-resistant disease and the rarer tumour subtypes are the settings where PET-CT most often becomes useful.
- The pelvis has a known limitation — Tracer collecting in the bladder can partially obscure nearby pelvic structures — your team has preparation steps to reduce this.
17+
Cancer Specialists
on Panel
on Panel
96.9%
Breast Cancer
Survival Rate*
Survival Rate*
15,000+
Patients
Treated
Treated
4.8★
Google Rating
(800+ reviews)
(800+ reviews)
For most gestational trophoblastic disease, your team monitors with the blood marker HCG and conventional imaging — PET-CT is not the routine test. It is considered in specific situations: when disease appears resistant to chemotherapy, when conventional scans give conflicting results, or for rarer subtypes where HCG is a less reliable guide.
CION does PET-CT in Hyderabad from Rs 10,499 — among the lowest published prices in the city, with no hidden charges. Indicative price, as of September 2026.
Is PET-CT a standard test for gestational trophoblastic disease?
For most gestational trophoblastic disease, no. The blood marker HCG reflects disease activity closely enough that ultrasound, chest X-ray, and CT alongside HCG monitoring guide most staging and treatment decisions. FIGO and ESMO guidelines do not include PET-CT as a routine step.
PET-CT is considered selectively — in situations where HCG and conventional imaging leave a gap — rather than as something every patient with GTD will have. If your oncologist has recommended one, there is a specific clinical reason.
When does your team consider a PET-CT?
- Disease resistant to chemotherapy — HCG not falling as expected, or rising despite treatment
- Placental site trophoblastic tumour or epithelioid trophoblastic tumour — rare subtypes that produce little HCG
- HCG and conventional imaging give conflicting results about where active disease is
- Rising HCG after remission with no active site visible on CT
- Before surgery for drug-resistant disease — to confirm the location of all active sites
PET-CT Partner Centres
PET-CT Scan Centres in Hyderabad
CION offers PET-CT scans through 4 trusted partner PET-CT centres across Hyderabad, so you can choose the one closest to you. Call 18002028726 and we’ll guide you to the earliest available appointment.
PET-CT Centre — Punjagutta
PET-CT Centre — Himayatnagar
PET-CT Centre — Narayanaguda
These are partner diagnostic centres within the CION network. Toll-free booking: 18002028726.
Meet the Specialists
17+ senior cancer specialists. One panel for your case.
Trained at AIIMS, Tata Memorial, and leading international centres. Combined 150+ years of experience. Every complex case is reviewed by 3+ of them — together.
Medical Oncologist
Medical Oncologist
Dr. C. Raghavendra Reddy
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
Medical Oncologist
Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
Medical Oncologist
Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
Medical Oncologist
Medical Oncologist
Surgical Oncologist
Dr. Muralidhar Muddusetty
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
Surgical Oncologist
Surgical Oncologist
Surgical Oncologist
Dr. Vinay Mamidala
MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)
Surgical Oncologist
Radiation Oncologist
Radiation Oncologist
Radiation Oncologist
Hematologist
Interventional Radiologist
Dr. Mohammed Imran
Surgical Oncologist
Dr. Vajja Sandeep Kumar
MBBS, MS (General Surgery), DrNB (Surgical Oncology), FALS Oncology
Surgical Oncologist
Want a specific doctor for your case? Mention them when booking.
Book Free ConsultationBook an appointment with our specialist
Share your name and number — we'll call you back within 30 minutes to schedule your consultation.
You do not have to work this out alone
A 45-minute consultation with a specialist who treats this every week.
What does PET-CT show in gestational trophoblastic disease?
PET-CT shows where cells are metabolically active. Most active tumour deposits take up the tracer at a higher rate than surrounding tissue, so your team can see where disease is alive — not just where a mass is visible on CT.
It can identify spread to the liver, lungs, brain, or less common sites. For placental site trophoblastic tumour and epithelioid trophoblastic tumour, where HCG is less reliable, imaging carries more weight and PET-CT gives a more complete picture of where disease is.
One limitation affects all pelvic gynaecological scans: the tracer leaves the body in urine, collects in the bladder, and can partially obscure nearby pelvic structures. You will be asked to empty your bladder just before pelvic images are acquired. Pelvic findings always need careful interpretation and, where relevant, biopsy confirmation before treatment decisions are changed.
What to expect at your PET-CT appointment
Preparation
Fast for four to six hours before arriving. Drink plain water only. Ask your team whether any regular medicines need to be paused.
Glucose check on arrival
A finger-prick test measures your blood glucose. High glucose reduces how effectively the tracer is taken up, and the scan may be rescheduled if the level is above the threshold your team uses.
Tracer injection
A small amount of radioactive tracer is injected through a cannula in your arm. You then rest quietly for around 45 to 60 minutes while it distributes through your body.
Bladder preparation
Just before the pelvic images are taken, you will be asked to empty your bladder. This reduces the tracer shadow that would otherwise partially obscure pelvic structures.
The scan
You lie still on the scanner table while images are acquired, typically over 20 to 30 minutes. Staying still gives the clearest result.
Results
A nuclear medicine specialist analyses the images and sends a report to your oncologist, who will discuss the findings with you at your next appointment.
Questions about this scan and your diagnosis
Can I have a PET-CT if I might be pregnant?
No. PET-CT uses ionising radiation and a radioactive tracer, both of which carry risk to a developing pregnancy. Tell your team before the scan is booked if there is any possibility you could be pregnant. A urine or blood pregnancy test is standard practice before imaging in women of reproductive age. If you are pregnant, your team will discuss which imaging is appropriate and when a PET-CT can be reconsidered.
My HCG is normal — why is my team still recommending a scan?
Normal HCG is strong evidence that most GTD is in remission, but it does not exclude all disease in every situation. For placental site trophoblastic tumour and epithelioid trophoblastic tumour, HCG can be low or normal even when disease is active, because these subtypes produce little of it. In those cases, or when a clinical finding does not fit the HCG result, imaging gives information the marker alone cannot provide.
If PET-CT finds something, will I need a biopsy?
Usually, yes. PET-CT shows where cells are metabolically active — it cannot confirm with certainty what is causing an uptake on the image. A positive finding guides where to look, but tissue confirmation is normally required before treatment decisions are changed. Your oncologist will advise whether biopsy is appropriate and safe for your specific situation.
What is drug-resistant gestational trophoblastic disease?
Drug-resistant GTD means disease remains active — shown by an HCG level that is not falling as expected, or that rises again after an initial response — despite the chemotherapy being used. It does not mean untreatable. Second-line chemotherapy regimens exist, and surgery to remove remaining tumour is part of the plan for some patients. Knowing exactly where active disease is located — which PET-CT can help establish — is part of why it is relevant in this setting.
Does CION do the PET-CT at the same centre as my treatment?
CION coordinates PET-CT through partner imaging centres. The scan is carried out at the partner facility, and the report returns to your CION oncologist, who will discuss findings with you. Your team will book the appointment and tell you which centre to attend and what preparation is needed. Chemotherapy and infusion treatment is given as day care at CION centres.
A whole-body PET-CT at CION is Rs 10,499 — among the lowest published prices in Hyderabad — with a free Rs 950 oncologist consultation to talk through your report. Indicative price, as of September 2026.
Explore 100 more PET-CT for Your Cancer Type topics
Gynaecological Cancer PET-CT
- PET-CT After Chemoradiation for Cervical Cancer
- PET-CT Cost for Gynaecological Cancer in Hyderabad
- PET-CT and Pregnancy: Why It Is Avoided
- PET-CT for Cervical Cancer
- PET-CT for Endometrial and Uterine Cancer
- PET-CT for Gestational Trophoblastic Disease
- PET-CT for Ovarian Cancer
- PET-CT for Vulvar and Vaginal Cancer
- Para-Aortic Node Uptake in Cervical Cancer
- Physiological Uterine and Ovarian Uptake
- Rising CA-125 With Normal Scans
- Why the Bladder Makes Pelvic PET Harder to Read
Breast Cancer PET-CT
- Axillary Node Uptake on PET for Breast Cancer
- Bone Metastases in Breast Cancer: PET or Bone Scan?
- Breastfeeding and PET-CT Scans
- Incidental Breast Uptake Found on a Scan for Something Else
- Is a PET-CT Needed for Early Breast Cancer?
- PET-CT Cost for Breast Cancer Staging in Hyderabad
- PET-CT and Breast Implants
- PET-CT for Breast Cancer Recurrence
- PET-CT for Breast Cancer: When Is It Needed?
- PET-CT for Locally Advanced Breast Cancer
- PET-CT for Triple-Negative and HER2-Positive Breast Cancer
- PET-CT to Check Response in Breast Cancer
GI, Liver & Colorectal PET-CT
- Focal Bowel Uptake: When to Do a Colonoscopy
- Mucinous Tumours: Why PET Often Misses Them
- PET-CT Before Liver Resection or HIPEC
- PET-CT Cost for GI Cancer Staging in Hyderabad
- PET-CT for Colorectal Cancer
- PET-CT for Gallbladder and Bile Duct Cancer
- PET-CT for Liver Cancer (Hepatocellular Carcinoma)
- PET-CT for Liver Metastases: How Reliable?
- PET-CT for Oesophageal and Stomach Cancer
- PET-CT for Pancreatic Cancer
- Peritoneal Spread on PET-CT: What It Can and Cannot See
- Rising CEA With Normal Scans: Where Does PET Fit?
Head, Neck & Thyroid PET-CT
- Dental Work, Fillings and Artefacts on Head-Neck PET
- Neck Node Uptake on PET: What It Means
- PET-CT After Radiotherapy for Head and Neck Cancer
- PET-CT Cost for Head and Neck Cancer in Hyderabad
- PET-CT for Cancer of Unknown Primary in the Neck
- PET-CT for Head and Neck Cancer
- PET-CT for Nasopharyngeal Cancer
- PET-CT for Oral Cancer Staging
- PET-CT for Salivary Gland and Sinus Tumours
- PET-CT for Thyroid Cancer: When Is It Used?
- Rising Thyroglobulin With a Negative Iodine Scan
- Vocal Cord and Muscle Uptake in the Neck
Lung Cancer PET-CT
- Adrenal Findings During Lung Cancer Staging
- Brain Metastases: Why PET Is Not Enough for Lung Cancer
- Lung Nodule With High Uptake: Cancer or TB?
- Mediastinal Nodes on PET-CT: Staging the Chest
- PET-CT After Lung Cancer Treatment
- PET-CT Before Lung Cancer Surgery
- PET-CT Cost for Lung Cancer Staging in Hyderabad
- PET-CT for Lung Cancer: What It Shows
- PET-CT for Mesothelioma
- PET-CT for Small Cell Lung Cancer
- PET-CT for a Lung Nodule: Is It Cancer?
- Pleural Effusion and Pleural Uptake on PET
Lymphoma & Blood Cancer PET-CT
- Bone Marrow Involvement on PET in Lymphoma
- Deauville Score in Lymphoma: The Complete Guide
- End-of-Treatment PET in Lymphoma
- How Many PET Scans Will a Lymphoma Patient Need?
- Interim PET in Lymphoma: The Scan That Changes Treatment
- Lymphoma Staging on PET-CT: Ann Arbor and Lugano
- PET-CT Cost Across a Lymphoma Treatment Course
- PET-CT for Hodgkin vs Non-Hodgkin Lymphoma
- PET-CT for Lymphoma: Why It Matters More Here
- PET-CT for Multiple Myeloma
- PET-CT in Leukaemia: When Is It Used?
- Residual Mass After Lymphoma Treatment: Scar or Disease?
- Surveillance PET Scans After Lymphoma Remission
- Thymic Rebound and Marrow Uptake in Young Lymphoma Patients
Non-Oncology PET-CT
- Brain PET for Dementia and Memory Loss
- Brain PET for Epilepsy and Seizure Focus
- Cardiac PET for Heart Muscle Viability
- Cardiac PET for Sarcoidosis and Inflammation
- Does a Non-Cancer PET-CT Cost the Same?
- PET-CT for Fever of Unknown Origin
- PET-CT for Non-Cancer Conditions: Why You Have Been Referred
- PET-CT for Suspected Bone or Spine Infection
- PET-CT for Suspected Infection in Implants and Grafts
- PET-CT for Unexplained Weight Loss
- PET-CT for Vasculitis and Large Vessel Inflammation
- Preparation for a Cardiac or Brain PET Scan
- What If a Non-Cancer PET Scan Finds Something Suspicious?
- Who Reports a Non-Oncology PET Scan?
Urological & Other Cancer PET-CT
- PET-CT Cost for Urological Cancers in Hyderabad
- PET-CT for Bladder Cancer
- PET-CT for Bone Metastases From Any Cancer
- PET-CT for Brain Tumours: Why MRI Comes First
- PET-CT for Kidney Cancer: Why FDG Is Unreliable
- PET-CT for Melanoma
- PET-CT for Neuroendocrine Tumours: FDG or DOTA?
- PET-CT for Paediatric Cancers
- PET-CT for Rare and Unusual Cancers
- PET-CT for Sarcoma
- PET-CT for Skin and Merkel Cell Cancers
- PET-CT for Testicular Cancer
Your next step
Talk to an oncologist about your scan
Your PET-CT report read by a senior oncologist, explained in plain language, with a free 45-minute consultation.
Common questions
Frequently asked questions
What is gestational trophoblastic disease?
GTD is a group of rare conditions that develop in the tissue normally forming the placenta during pregnancy. It includes molar pregnancies and — at the other end — choriocarcinoma, a cancer. Even the cancerous forms respond very well to treatment, usually chemotherapy alone. Outcomes are generally good when managed through a specialist pathway. Because it is rare, care is best delivered by a team that sees it regularly.
Why is HCG such an important marker in GTD?
HCG is the hormone that GTD cells produce, and its blood level closely reflects how much disease is present. It rises when disease is active and falls when treatment is working. Most cancers do not have a marker this reliable. This is why monitoring in GTD relies on HCG more than imaging — and why a rising HCG after remission is taken seriously even before a scan has found anything visible.
Is PET-CT better than CT for detecting spread in GTD?
Not as a general rule. CT is the standard staging tool for most GTD, and HCG provides real-time information about disease activity that no scan can replicate. PET-CT adds value in specific situations — drug resistance, rare subtypes with low HCG production, or when a clinical finding does not fit the CT result — rather than as a replacement. Your team chooses based on what clinical question needs answering.
What are placental site trophoblastic tumour and epithelioid trophoblastic tumour?
PSTT and ETT are the two rarest subtypes of GTD. Unlike choriocarcinoma, they produce little HCG, making that marker less reliable as a guide. They are also less responsive to chemotherapy, and surgery is often the main treatment. Because imaging matters more in these subtypes, PET-CT is more commonly part of their assessment. Your oncologist will explain what your specific subtype means for your treatment plan.
How long does the scan take altogether?
Plan for two to three hours at the imaging centre. The longest part is the rest period after the tracer injection — around 45 to 60 minutes. The scan itself takes approximately 20 to 30 minutes. You do not need to stay afterwards, though your team will advise you to avoid close, prolonged contact with young children or pregnant people for a few hours after the scan while the tracer clears.
Will I be radioactive after the scan?
Briefly, and only slightly. The tracer has a short half-life, which means most of it has gone within a few hours. Your team will give specific guidance, but a common recommendation is to avoid sustained close contact — sitting next to a young child or a pregnant person for an extended period — for a few hours. Normal daily activities, including public transport, are fine.