Incidental findings
What an Incidental Adrenal — or Kidney Finding Actually Means
A PET-CT images the whole body, so it sometimes picks up something on an organ that was not the reason for the scan. Most of these findings are harmless nodules found by chance. Your team will decide whether a follow-up scan is needed.
Medically reviewed by Dr. C. Raghavendra Reddy, Medical Oncologist, MBBS (Gold Medal) · DNB · DM (Medical Oncology, Gold Medal) · Last reviewed September 2026
- Not the same as spread — A finding on a different organ does not automatically mean your cancer has spread there.
- Usually benign — Most adrenal incidentalomas are harmless adenomas — small nodules found by chance on a large proportion of abdominal scans worldwide.
- Further imaging decides — The type and urgency of any follow-up depends on the size and appearance of the finding.
- Your team interprets it — Only your oncologist can say what this finding means in the context of your specific situation.
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An incidental adrenal or kidney finding means the scan noticed something on that organ that was not the reason for the scan. Most incidental adrenal findings are benign adenomas — harmless nodules. Your oncologist will decide whether a dedicated follow-up scan is needed, based on the size, appearance, and your overall clinical picture.
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Why did the scan find something in your adrenal gland or kidney?
PET-CT images the whole body. When a radiologist reads your scan, they report everything visible — including organs that had nothing to do with your cancer care.
An incidental finding means something was noticed by chance, not because of a symptom or clinical suspicion. It does not, by itself, mean the cancer has spread.
The Endocrine Society notes that adrenal nodules appear on a substantial proportion of abdominal scans done for unrelated reasons, and the large majority are benign adenomas — small, non-functioning nodules that need no treatment.
Whether this finding needs investigation — and how soon — is a clinical judgement your oncologist makes, not a conclusion the scan report reaches on its own.
What to tell and ask at your next appointment
- Bring the written radiology report so your oncologist can review the exact wording used.
- Ask whether this finding appeared on any earlier scan — stability over time is an important reassuring sign.
- Tell your team about any symptoms: flank pain, high blood pressure that is difficult to control, or unexplained weight change.
- Ask what the recommended next investigation is, and how soon it should happen.
- Ask whether this finding changes your current cancer treatment plan in any way.
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PET-CT Centre — Punjagutta
PET-CT Centre — Himayatnagar
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What the words in your report mean
- Incidentaloma
- A nodule or mass found by chance on a scan done for a different reason. The name does not imply it is dangerous — it simply means it was unexpected.
- Adrenal adenoma
- A benign nodule on the adrenal gland. Adenomas are the most common adrenal incidentaloma. They rarely cause symptoms and usually need no treatment.
- FDG-avid lesion
- A finding that took up the radioactive sugar used in a PET scan. Some benign lesions are FDG-avid, so this term alone does not mean cancer.
- Indeterminate lesion
- A finding whose nature the scan could not establish with certainty. A different type of scan — or comparison with older images — is usually the next step.
- Adrenal protocol CT
- A dedicated CT of the adrenal glands using a specific contrast technique to characterise a nodule. It is the most common follow-up test for an adrenal incidentaloma.
- Simple renal cyst
- A fluid-filled sac in the kidney. Simple cysts are not cancerous and almost always need no treatment. A cyst with complex features may need further assessment.
Questions families ask when this happens
Does this mean my cancer has spread to the adrenal gland or kidney?
An incidental finding and a cancer deposit are described very differently in a radiology report, and if your oncologist suspected spread, they would tell you directly. An incidental finding is a separate, unrelated observation. Whether it is truly unrelated needs confirmation — which is what the follow-up scan is for — but the starting assumption for a small adrenal nodule is that it is a benign adenoma rather than a secondary deposit.
How urgent is the follow-up investigation?
This depends on the characteristics of the finding. A small, smooth adrenal nodule in someone with no hormone symptoms is rarely urgent; a larger lesion, an irregular kidney mass, or anything with features that raise concern will be reviewed sooner. Your oncologist will set the timeline. If you leave your next appointment without a clear plan, ask directly: 'When should the next scan happen, and what are we looking for?'
Will this delay my cancer treatment?
In most cases it does not. An incidental adrenal adenoma is usually watched alongside ongoing treatment rather than treated as a reason to pause. If the finding needs more prompt investigation — for example, a large adrenal mass with hormonal symptoms, or a kidney lesion with suspicious features — your oncologist will weigh that against your primary treatment and explain the reasoning. When delays happen, they are usually measured in weeks rather than months.
We are already overwhelmed. Does this really need to be investigated?
That is a reasonable thing to say out loud to your oncologist. Some findings are so clearly benign — a small, stable, fatty adenoma — that the team may recommend no further investigation at all. Others have features that make it clinically important to know what they are, because the answer could affect your treatment. Your oncologist can tell you clearly which category this finding falls into, so you are making a decision with information rather than simply adding another appointment.
CION does PET-CT in Hyderabad from Rs 10,499 — among the lowest published prices in the city — including an oncologist-reviewed report and a free Rs 950 consultation. Indicative price, as of September 2026.
Explore 94 more Understanding Your PET-CT Report topics
Incidental Findings
- A Second Unrelated Cancer Found on PET-CT
- An Incidental Bone Finding on PET-CT
- An Incidental Breast Finding on PET-CT
- An Incidental Kidney or Adrenal Finding
- An Incidental Liver Lesion on PET-CT
- An Incidental Lung Nodule Found on PET-CT
- An Incidental Prostate Finding on PET-CT
- An Incidental Thyroid Nodule on Your PET Scan
- Do All Incidental Findings Need Investigation?
- Focal Bowel Uptake: Could It Be a Polyp?
- Incidental Findings on a PET-CT Scan: What They Are
- Incidental Heart Findings on a Cancer PET Scan
- The Cost of Chasing an Incidental Finding
- What to Ask Your Doctor About an Incidental Finding
False Positives, False Negatives & Pitfalls
- Bladder, Kidney and Ureter Activity on PET
- Bone Marrow Uptake After Growth Factor Injections
- Bowel Uptake: Normal, Inflammation or Something Else?
- Brown Fat Uptake: A Common Cause of Confusing Findings
- Does a Suspicious PET Finding Always Need a Biopsy?
- Getting a Second Read of Your PET-CT Images
- How Often Is a PET-CT Scan Wrong?
- Muscle Uptake After Exercise or Injections
- Thymic and Rebound Uptake in Younger Patients
- Uptake After Radiotherapy: Inflammation or Disease?
- Uptake at a Biopsy or Surgery Site
- What Causes a False Negative on a PET Scan?
- What Causes a False Positive on a PET Scan?
- What Happens If Two Scans Disagree?
- Which Cancers Do Not Show Well on PET-CT?
- Why the Brain Always Lights Up on PET
Infection, TB & Inflammation on PET
- Can Tuberculosis Look Like Cancer on a PET Scan?
- Dental Infection and Jaw Uptake on PET
- Fungal Infection and Abscess on PET-CT
- How Long Should You Wait After an Infection Before a PET Scan?
- If It Might Be Infection, What Test Comes Next?
- Inflammation After Injections, Vaccines and Cannulas
- Old Healed TB and Calcified Nodes on PET-CT
- PET-CT for Fever of Unknown Origin
- PET-CT for Suspected Infection in Implants and Prostheses
- PET-CT for Vasculitis and Inflammatory Conditions
- Pneumonia and Recent Chest Infection on PET
- Sarcoidosis on PET-CT: The Great Mimic
- TB or Cancer? How Doctors Tell Them Apart
- Thyroid Uptake on PET: Diffuse vs Focal
Reading Your Report: Core Terms
- 'Cannot Be Excluded' and Other Cautious Phrases
- 'Deauville Score' on a Lymphoma PET Report
- 'FDG Avid': What It Means on Your Report
- 'Hypermetabolic': What the Word Actually Means
- 'Hypometabolic' and 'Photopenic' Findings
- 'Impression' vs 'Findings': Which Section Should You Read?
- 'Interval Change' and 'Stable Since Previous Study'
- 'Krenning Score' on a DOTANOC or DOTATATE Report
- 'Lymphadenopathy' on Your PET Report
- 'Metabolically Active Disease': What It Tells You
- 'Metastasis' and 'Distant Spread' on Your Report
- 'Mildly FDG Avid' vs 'Intensely FDG Avid'
- 'No Abnormal FDG Uptake': Is That a Clear Scan?
- 'Physiological Uptake': Normal Areas That Always Light Up
- 'Residual Disease' vs 'Complete Metabolic Response'
- 'Sub-Centimetre Node' and Why Size Matters on PET
- 'Suspicious for Malignancy': How Certain Is That?
- How Long Does a PET-CT Report Take?
- How to Read Your PET-CT Report: A Section-by-Section Guide
- Should You Read Your Own PET-CT Report Before the Consult?
- TNM Staging on a PET-CT Report
- Why Your Report Mentions the Liver and Blood Pool
Response Assessment Scores & Criteria
- Complete Metabolic Response: What It Means
- Deauville Score 1 to 5: The Lymphoma Scale Explained
- End-of-Treatment PET Scan: What It Decides
- How Doctors Judge Whether Treatment Is Working on PET-CT
- Interim PET Scan During Chemotherapy: Why It Is Done
- Metabolic Response vs Size Response: Why They Differ
- PERCIST Criteria: How Metabolic Response Is Measured
- Partial Metabolic Response: Is That Good Enough?
- Progressive Metabolic Disease: What Happens Next
- RECIST vs PERCIST: Size vs Activity
- Stable Metabolic Disease: Good News or Bad?
- Tumour Flare and Pseudoprogression on PET
- What Is a Deauville 3 and Why Is It Ambiguous?
- Why the Scan Says One Thing and You Feel Another
SUV Values Explained
- Comparing SUV Between Two Scans: Is It Meaningful?
- Does a Higher SUV Mean a More Aggressive Cancer?
- Factors That Change Your SUV Reading
- High SUV but Not Cancer: When the Number Misleads
- Is My SUVmax of 4 High? Reading Your Specific Number
- Low SUV but Still Cancer: The PET-Negative Cancers
- SUV in Non-Cancer Conditions
- SUVmax, SUVmean and SUVpeak: What Is the Difference?
- What Is SUV on a PET Scan?
- What Is a Normal SUV Value?
- What SUV Value Indicates Cancer?
- Why Blood Sugar Changes Your SUV Result
- Why Did My SUV Go Down but Not to Zero?
- Why Did My SUV Go Up After Treatment?
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Common questions
Frequently asked questions
What does incidental finding mean on a PET-CT report?
It means the scan noticed something that was not the reason for the scan. PET-CT images the whole body, so the radiologist reports everything they see — including findings on organs that were not being investigated. Incidental means unexpected, not dangerous. Whether the finding matters clinically depends on what it looks like and how it behaves on follow-up imaging, and that is a question your oncologist will answer.
Are adrenal nodules on PET-CT usually cancerous?
No. The Endocrine Society guidance is that the large majority of adrenal incidentalomas are benign adenomas. Adrenal cancer is uncommon. A PET scan can make some benign adenomas appear active because they take up the radioactive tracer, which is why a dedicated adrenal protocol CT or MRI is often used to characterise the finding further — rather than relying on the PET result alone.
What scan will I need next for an adrenal or kidney finding?
For an adrenal finding, the most common next step is a dedicated adrenal protocol CT — a scan using a specific contrast technique to distinguish a benign adenoma from something that needs further attention. For a kidney finding, a renal ultrasound or contrast CT is typically used. Your oncologist will decide which applies based on what the PET-CT showed and your overall clinical situation.
How long will it take to get a clear answer?
A straightforward adrenal adenoma can often be confirmed from a single dedicated CT scan, with results available within a week or two. A finding that remains indeterminate may need comparison with older scans, a repeat scan after a few months, or input from an endocrinologist. Ask your oncologist for a specific timeline at your next appointment so you are not waiting without a plan.
Could this finding affect my cancer treatment?
In most cases it does not. A confirmed benign adenoma is unlikely to change anything. A hormonally active adrenal nodule may need treatment before certain procedures can be safely done — your oncologist and an endocrinologist would decide together. A kidney finding would only affect your treatment plan if it turned out to be a separate cancer requiring its own management. Your team will keep you informed at each stage.
This finding was not mentioned on my previous scan. Should I be worried?
A newly reported finding is not automatically concerning, but it is the right thing to investigate. Small nodules can appear new because they were not present or not reported on an earlier scan, or because the imaging technique differed. A genuinely new nodule will be characterised by the follow-up scan. Tell your oncologist when you first noticed this was mentioned, and ask them to compare the current report with any available earlier imaging.