Incidental Finding on a Scan: What It Means and What to Do Next

An incidental finding is something your radiologist spots on your scan that wasn't the reason your doctor ordered the imaging in the first place. It's an unexpected discovery — and for many patients, reading those words in a radiology report triggers immediate anxiety.

The good news: most incidental findings are benign and require nothing more than routine monitoring. Here is what the term means, what your report is telling you, and exactly what your next steps should be.

Key Takeaways

• An incidental finding is something discovered on a scan that is unrelated to the reason the scan was ordered.
• Incidental findings appear in 20 to 40 percent of all advanced imaging studies — they are far more common than most patients realize.
• The majority of incidental findings are benign and require either no treatment or simple monitoring with a follow-up scan.
• Your radiology report will include a specific recommendation for each finding — follow it and then discuss it with your doctor.
• When caught early, incidental findings can be life-saving: singer Barry Manilow's Stage 1 lung cancer was discovered incidentally on an MRI in 2026 when he had no symptoms.

What Is an Incidental Finding?

An incidental finding — sometimes called an "incidentaloma" — is an unexpected abnormality discovered during imaging that was ordered for a different reason. Your doctor sent you for a scan of your spine, your abdomen, or your chest for a specific question. During that review, the radiologist noticed something else: a small nodule, a cyst, an area of density, or another structural difference that was not part of the original clinical question.

The American College of Radiology (ACR) has developed detailed guidelines specifically for managing the most common types of incidental findings — including lung nodules, kidney cysts, liver lesions, and adrenal masses. Those guidelines exist precisely because incidental findings are so common, not because they are typically dangerous.

How Common Are Incidental Findings?

According to data cited by the Radiological Society of North America (RSNA), incidental findings appear in 20 to 40 percent of all advanced imaging studies. Chest CT scans have the highest rate, with unexpected findings noted in up to 45 percent of exams. Brain and spine MRIs show incidental findings in roughly 22 percent of cases.

That means if you have ever had an MRI or CT scan, there is a meaningful probability that something was documented in your report that was not the focus of the scan.

What Your Radiology Report Says

When a radiologist identifies an incidental finding, they document it in the Findings section of the report and then summarize what it means and what should happen next in the Impression section. Understanding the language your radiologist uses can reduce a lot of the fear that comes with seeing an unexpected result.

Common phrases you may see:

• "Incidental [nodule / cyst / mass] noted" — The radiologist has identified something outside the scope of the original scan.
• "Follow-up recommended" — A repeat scan at a specific interval (often 3, 6, or 12 months) is advised to check whether the finding changes.
• "Further evaluation advised" — An additional imaging test or clinical assessment is recommended before any conclusions can be drawn.
• "Likely benign; correlate clinically" — The finding looks non-cancerous, but your doctor should connect it to your symptoms and medical history.
• "Stable compared to prior imaging" — If you have had previous scans, the finding has not grown or changed, which is a reassuring sign.

Each of these phrases carries a different level of urgency. For a broader guide to reading all sections of your radiology report, our guide to understanding a radiology report walks through the standard format step by step.

Most Common Types of Incidental Findings

Different scan types tend to surface different kinds of unexpected findings.

On chest and abdominal CT scans:

• Pulmonary nodules — small spots on the lung, the most frequently noted lung incidentaloma
• Liver cysts or hemangiomas (benign vascular growths)
• Adrenal adenomas (small, almost always non-functioning growths on the adrenal glands)
• Simple kidney cysts

On brain MRI:

• Arachnoid cysts (fluid-filled sacs, almost always benign)
• Small meningiomas (typically slow-growing tumors of the lining of the brain)
• White matter changes (often a normal finding related to aging or migraine history)

On spine MRI:

• Disc changes at levels not originally being evaluated
• Hemangiomas within vertebral bodies (benign bone lesions, extremely common)
• Incidental soft tissue findings adjacent to the spine

If your report specifically mentions a lung nodule, our dedicated guide on lung nodules found on CT explains Fleischner Society follow-up guidelines, size thresholds, and what the timing recommendations mean.

What Happens Next: Four Steps

The steps that follow an incidental finding depend on what the finding looks like, where it is, and your overall health history. Here is the typical sequence:

Step 1 — The radiologist flags it. The radiologist documents the finding in the report and includes a specific management recommendation. For lung nodules, radiologists follow the Fleischner Society guidelines, which base follow-up timing on nodule size and characteristics. For liver findings, they follow the ACR Liver Imaging Reporting and Data System (LI-RADS). These structured protocols help standardize care.

Step 2 — Your ordering doctor reviews the report. Your physician reads the radiologist's recommendation and determines whether the finding changes your care plan. Small, clearly benign findings — such as a simple cyst with thin walls and no internal complexity — may be documented with no further action. Larger or more ambiguous findings will lead to a follow-up plan.

Step 3 — A follow-up is arranged. This may mean a repeat scan in 3, 6, or 12 months to check for any growth or change. It may mean a referral to a specialist. In some cases, if imaging characteristics are concerning enough, a biopsy may be recommended. Ask your doctor directly what is being recommended and why.

Step 4 — You stay in the loop. Before leaving your next appointment, confirm: What is this finding? How likely is it to be serious? What does the follow-up plan look like? What signs or symptoms should prompt me to call sooner? The American College of Radiology recommends that every incidental finding be discussed with your doctor so you understand the reasoning behind the recommended management approach.

Why Incidental Findings Can Save Lives

In 2026, singer Barry Manilow revealed that his doctors had found Stage 1 lung cancer not because he had any respiratory symptoms, but because his physician ordered an MRI after he had suffered through two prolonged bouts of bronchitis. The imaging — initially for another purpose — revealed a cancerous spot on his left lung. He described the discovery as "pure luck" and credited his doctor and the early detection with giving him the best possible outcome. He underwent a lobectomy and recovered.

His story reflects what the medical literature consistently shows: incidental findings caught at an early stage, when tumors are small and localized, carry a much better prognosis than cancers found after symptoms develop. This is not an argument for scanning the body without clinical reason — but it is a genuine reminder that an unexpected finding, even one that requires further workup, is not automatically catastrophic news.

Managing the Anxiety That Follows

The period between learning about an incidental finding and receiving follow-up results is one of the most stressful experiences many patients go through. Radiologists and psychologists recognize this — it even has a name: scanxiety. Practical strategies that help include scheduling your follow-up appointment immediately so you have a firm endpoint, avoiding online searches about your specific finding without clinical context, and talking directly with your doctor about the realistic probability of a serious outcome.

Our guide on managing imaging results anxiety covers evidence-based coping tools in detail, including scheduled worry time, what to ask before you leave the imaging center, and how to prepare emotionally for a follow-up appointment.

Frequently Asked Questions

Does an incidental finding mean I have cancer?

No. The large majority of incidental findings are benign. The term simply means the radiologist found something unrelated to the original scan question. Most findings turn out to be cysts, benign tumors, or normal anatomical variations that need no treatment.

What should I do if my report says "follow-up recommended"?

Contact your ordering physician's office as soon as possible and ask them to clarify the recommended timeline. Some follow-ups are urgent — within days or weeks. Others are routine — within 3 to 6 months. Do not assume the office will call you; take the initiative to confirm the plan in writing.

Can I get a second opinion on an incidental finding?

Yes. If the finding is complex or the recommended next step involves an invasive procedure, a formal radiology second opinion from an academic medical center or subspecialty imaging group can be valuable. Your doctor can facilitate the process, or you can contact a major academic center directly to request a re-read of the original images.

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Disclaimer: This article is for educational purposes only and does not constitute medical advice. Always consult with a qualified healthcare professional for diagnosis and treatment decisions.