*Source: https://www.years.co/en/zufallsbefunde* The downside, with numbers # In around one in three whole-body MRI scans something turns up that nobody was looking for. Incidental findings are the most frequently omitted part of a check-up. This page gives the rate, the uncertainty behind it and what follows when a finding appears. Every figure with its study base, participant count and confidence interval. The limits set out here apply to us as well. Free intro call Book appointment 32,1 % critical or indeterminate incidental findings, 12 studies 3,9 % potentially serious findings, 27,643 participants 0 studies verifying findings beyond five years The short answer ## What an incidental finding is, and why it comes with the territory An incidental finding is an abnormality nobody went looking for. It appears because imaging does not only answer the question that was asked but shows everything inside the field of view. With whole-body MRI, that is almost everything. Across 12 studies with 5,373 people without symptoms, 32.1 percent had a critical or indeterminate incidental finding. Potentially serious findings were the smaller share: 3.9 percent across 32 studies with 27,643 participants. Both figures carry wide confidence intervals, because imaging protocols differ substantially. This does not mean broad diagnostics are pointless. It means the question of what a finding would lead to belongs before the examination. Ask it afterwards and you decide under pressure. The numbers ## Three figures, and what each of them does not mean Every figure here comes with its study base and confidence interval. Without the interval a percentage looks more precise than it is. 32,1 % 95% CI: 18.3 to 50.1 of asymptomatic subjects had a critical or indeterminate incidental finding Kwee and Kwee 2019, systematic review and meta-analysis across 12 studies with 5,373 asymptomatic subjects What it means An incidental finding is not the exception in whole-body MRI but an expected part of the result. Anyone being scanned should know beforehand that the probability sits in the order of one in three. What it does not mean It does not mean a third of those scanned are ill. Critical and indeterminate are separate categories: 13.4 percent critical, 13.9 percent indeterminate. Indeterminate means the scan alone does not answer the question. 3,9 % 95% CI: 0.4 to 27.1 had a potentially serious incidental finding on brain and body MRI Gibson et al. 2018, systematic review and meta-analysis across 32 studies with 27,643 participants What it means The number that matters is considerably smaller than the overall rate. Most incidental findings are harmless. Including findings of uncertain seriousness, the share rises to 12.8 percent. What it does not mean It does not mean that all of those 3.9 percent benefit from the discovery. About half of the potentially serious findings were suspected malignancies, and whether finding them early improves outcomes is not shown by this. 16,0 % 95% CI: 1.9 to 65.8 of followed-up findings were confirmed as false positives Kwee and Kwee 2019, sub-analysis of the 6 studies that reported false positives at all What it means Part of the work-up chain ends with nothing, after costing time, money and worry. That is not an outlier but a built-in component of broad diagnostics. What it does not mean This is the least certain figure on the page. The interval runs from 1.9 to 65.8 percent, and only 6 of the 12 studies reported false positives at all. It does not work as a point estimate, only as an order of magnitude. What the numbers leave open ## Four limitations that rarely get mentioned ### None of the included studies verified negative findings beyond five years That is stated verbatim in the results section of Kwee and Kwee. It means: how often a normal whole-body MRI actually stayed normal over more than five years has not been studied. The reassuring statement after a normal scan therefore rests on weaker evidence than the worrying one after a finding. ### Whether whole-body screening reduces mortality is an open question, not a settled one Cochrane registered a review protocol on this in 2026. A protocol is the registered plan, not the result: no studies have been included yet and no finding exists. What matters here is the authors’ rationale. They write that it has not been established whether whole-body MRI or CT reduces morbidity or mortality in asymptomatic adults. ### The rate depends on the protocol, not on the person In studies that included vascular or colon imaging the rate was 49.7 percent; in studies without those sequences, 23.0 percent. The difference is statistically robust. Image more and you find more, and part of that is noise. Any provider quoting a single percentage as their rate is implying a precision the evidence does not support. ### Heterogeneity between studies is enormous Heterogeneity ran at an I² of 95.6 to 99.1. That value describes how much of the variation between studies cannot be explained by chance. At this level, pooled percentages are orientation figures, not measurements. That is precisely why every number on this page carries its interval. The handling ## What happens here when a finding appears We cannot change the rate, only how it is handled. These four rules apply regardless of which procedure produced a finding. ### A finding is a reason for work-up, never a diagnosis That applies here regardless of which procedure produced the finding. An abnormal image or value describes a state at one point in time. What it means is decided in the interpretation, and that is a medical task. ### Interpretation comes before communication A finding does not reach you as raw data but together with an assessment of how likely it is to mean something and what the sensible next step is. A value without context creates worry without enabling a decision. ### Work-up continues within standard care A finding that needs working up belongs in specialist care, not in an add-on service. We hand over and do not replace that path. It is also why we offer no procedure whose only purpose is to keep a finding in-house. ### No research-adjacent result triggers treatment Procedures we classify as research-adjacent are documented and contextualised. On their own they do not justify treatment. This rule is set out in full on our evidence page and applies even when a result looks striking. The full evidence classification of every procedure is on our evidence page . The kinds of harm that exist in principle are set out on the preventive medicine page . Limits, including our own ## What we do not claim on this page - That these numbers do not apply to YEARS. They come from the literature on whole-body MRI in people without symptoms, and our MRI is not exempt. Anyone claiming the problem does not exist at their clinic has either not measured it or is not telling you. - That a comprehensive check-up extends life expectancy. There is no randomised trial for that, and we do not cite such evidence anywhere else either. - That a normal result means all-clear for the years ahead. The evidence on how long a normal finding holds is thin, and we say so before the examination, not after. - That this page makes a decision for you. It supplies the numbers that decision usually lacks. Whether a broad check-up helps more than it burdens in your situation is a medical question, not a question for a website. Sources ## Every figure on this page comes from one of these works Two systematic reviews with meta-analysis and one registered Cochrane protocol. The protocol explicitly has no results yet and is cited here only for its statement of the open question. - Kwee R.M., Kwee T.C., J Magn Reson Imaging 2019;50(5):1489–1503 Systematic review and meta-analysis, 12 studies, 5,373 asymptomatic subjects. Source for the 32.1 percent, the split into 13.4 and 13.9 percent, the 16.0 percent false positives, the protocol difference of 49.7 versus 23.0 percent, and the statement that no study verified negative findings beyond five years. - Gibson L.M. et al., BMJ 2018;363:k4577 Systematic review and meta-analysis, 32 studies, 27,643 participants. Source for the 3.9 percent potentially serious incidental findings on brain and body MRI, the 12.8 percent including findings of uncertain seriousness, and the share of suspected malignancies. - Chen Z. et al., Cochrane Database of Systematic Reviews 2026, Protokoll CD016234 Registered review protocol, explicitly without included studies and without results. What is cited here is solely the rationale for the undertaking: that it has not been established whether whole-body MRI or CT reduces morbidity or mortality in asymptomatic adults. ## Common questions about incidental findings How common are incidental findings in a whole-body MRI? + In the largest synthesis available the rate was 32.1 percent, with a 95 percent confidence interval of 18.3 to 50.1. The analysis pools 12 studies covering 5,373 people without symptoms. It refers to critical and indeterminate findings together, split into 13.4 percent critical and 13.9 percent indeterminate. What matters for interpretation is that the rate depends heavily on the imaging protocol: studies including vascular or colon imaging reached 49.7 percent, studies without those sequences 23.0 percent. Quoting a single percentage as a binding rate would therefore mislead. The defensible statement is this: in whole-body MRI an incidental finding is an expected outcome, not an exception. Are incidental findings dangerous? + Most are not. A meta-analysis of 32 studies with 27,643 participants found potentially serious incidental findings in 3.9 percent of brain and body MRI examinations, with a very wide confidence interval of 0.4 to 27.1. Including findings of uncertain seriousness, the share rises to 12.8 percent. About half the potentially serious findings were suspected malignancies. The real risk lies less in the finding itself than in the chain it sets off: further imaging, sometimes a tissue sample, occasionally a procedure that turns out in hindsight to have been unnecessary. That is why the question of what a finding would lead to belongs before the examination, not after it. What happens at YEARS when an incidental finding appears? + A finding does not reach you as raw data but with medical interpretation: how likely it is to mean something, which explanations may sit behind it, and what the sensible next step is. An abnormal image or value is a reason for work-up here and never a diagnosis. The work-up itself continues within specialist standard care, which is where we hand over. We do not replace that path and deliberately offer no procedure whose purpose is to keep a finding in-house. Results from procedures we classify as research-adjacent are documented and contextualised, but on their own they do not trigger treatment. Does this argue against having a check-up? + It argues against a check-up sold without this information. The trade-off looks different for everyone. For someone with a family history or a concrete risk profile, broad examination can make sense. For someone without risk indicators and with a low tolerance for uncertainty, the most likely outcome is a work-up chain that ends with nothing. More important than whether you get examined is which parts of an examination rest on solid evidence. Blood pressure, lipids including ApoB, early detection of diabetes, cardiorespiratory fitness and established cancer screening do. Whole-body imaging does not, not with that degree of certainty, and we do not claim otherwise. How reliable is a normal result? + Less reliable than most people assume, and this is the most uncomfortable figure on the page. In the Kwee and Kwee meta-analysis, not one of the 12 included studies verified negative findings beyond five years. How often a normal whole-body MRI actually stayed normal over the longer term is therefore simply not studied. Only one study reported false negatives, at a rate of 2.0 percent. In practice: a normal result is a snapshot, not a clean bill of health. In particular it does not replace established screening with its fixed intervals, which is designed around intervals rather than a single examination for exactly this reason. ## Read on This page gives the rate. The pages below put it in context. Evidence Why incidental findings arise statistically, with a worked example and evidence tiers per procedure. Preventive medicine The levels of prevention, what statutory insurance covers and where screening can do harm. Whole-body MRI screening 3 Tesla, without contrast agent, with an open account of incidental findings. Whole-body check-up What a comprehensive check-up includes and who it makes sense for. Cancer screening Established cancer screening with its intervals, which a check-up does not replace. Precision prevention The claim ladder applied to 13 procedures, plus providers with sources. ## Talk about it beforehand, not afterwards. 15 minutes, free of charge. We go through what a finding would set off in your situation. If a program adds little for you, we say so. Free intro call (15 min) Reserve appointment ★ 4,9 · 71+ Google- reviews · PKV, Beihilfe & bKV reimbursable Medical Disclaimer This information is provided for general education and is not a substitute for professional medical advice, diagnosis or treatment. Please discuss findings and individual medical decisions with a qualified physician. Content is reviewed periodically against the current state of scientific evidence.