Lung Cancer Missed on a Chest X-Ray in Ireland: Your Right to Claim
· Republic of Ireland
In short: If a lung cancer was visible on an earlier chest x-ray but the radiologist did not report it, or a symptomatic patient with a normal x-ray was not referred onward, and that delay led to a worse outcome, you may have a medical negligence claim in Ireland. An abnormal chest x-ray that suggests lung cancer should be referred to a Rapid Access Lung Clinic for a CT scan, because a plain x-ray cannot rule the disease out. A delayed diagnosis can remove treatment options that were available earlier, which is why understanding how the chest x-ray failure happened is the first step toward pursuing compensation.
The legal test: the Dunne standard, which asks whether a competent radiologist of similar standing should have seen and reported the lesion.
Time limit: generally two years less one day from your date of knowledge.
Who you claim against: usually the hospital or HSE, defended by the State Claims Agency, not the individual doctor.
The Irish referral standard: a suspicious chest x-ray should go to a Rapid Access Lung Clinic, where the national target is to be seen within ten days.
Process: medical negligence skips the Injuries Resolution Board and goes straight to the High Court. A claim takes around four years on average.
Compensation cap: general damages are capped at about €550,000, but special damages for care and lost earnings are uncapped.
This page deals with one specific situation: a primary lung cancer that was missed on a plain chest x-ray. Lung cancer is the leading cause of cancer death in Ireland, according to the National Cancer Registry Ireland, and a missed x-ray is one of the ways a diagnosis gets delayed. For the full range of failures in the Irish lung cancer pathway, including delayed referral and treatment errors, see our main page on lung cancer misdiagnosis claims. If your concern relates to asbestos exposure, mesothelioma is a separate cancer of the lung lining with its own page. This page sits within our wider guide to cancer misdiagnosis claims in Ireland.
Contents
How does a lung cancer get missed on a chest x-ray?
A lung cancer is usually missed on a chest x-ray for one of two reasons: the reporting doctor does not see a lesion that is there (a perceptual error), or sees it but reads it as something harmless like a scar or old infection (a cognitive error). Perceptual misses are the more common source of claims. What matters legally isn't that a mistake happened. It's whether a competent radiologist of similar standing, working in similar conditions, should have spotted and reported the lesion.
Many people in this position ask the same difficult question: was this negligence, or just bad luck? It's a fair question, and the honest answer is that not every missed cancer is negligent. Chest x-rays have real limits, and some tumours are genuinely invisible on the film. The law doesn't ask for perfection. It asks whether the care fell below the standard of a reasonably competent radiologist. Drawing that line is the whole purpose of the independent expert review described below, and it's why a missed diagnosis is a starting point for investigation rather than proof of a claim.
Chest x-rays are hard to read because the chest is three-dimensional but the image is flat. A small tumour can hide behind a rib, the collarbone, the heart, or the large vessels at the centre of the chest. One well-documented trap is the satisfaction of search effect, where finding one abnormality causes a reader to stop searching for others. A doctor finds one obvious problem, such as a cracked rib or a chest infection, and stops looking before noticing a separate, smaller nodule on the same film. When we review these cases, the report often records a minor unrelated finding while the cancer goes unmentioned.
Where the lesion sits tells you a lot about whether a claim is likely to succeed. The table below sets out the regions where lung cancers are most often overlooked and what each location means for a claim.
| Region of the chest | Why it's easy to miss | What it means for a claim |
|---|---|---|
| Lung apices (top of the lungs) | Hidden by the collarbones and upper ribs | An expert decides whether the area was genuinely hard to see, or simply not examined carefully enough |
| Behind the heart (retrocardiac) | Hidden by the dense shadow of the heart | If symptoms were significant, relying on the x-ray alone instead of a CT scan may itself be a failure |
| The central vessels (hila) | Dense, overlapping blood vessels and lymph nodes | Reading a tumour here as a normal vessel is a recognised, actionable error |
| Beside the central structures (paramediastinal) | The tumour blends into the outline of the heart and great vessels | May need the on-screen image contrast adjusted. Not doing so can fall below the expected standard |
What is the Rapid Access Lung Clinic pathway, and where does it break?
In Ireland, a patient with a suspicious chest x-ray or worrying symptoms should be referred to a Rapid Access Lung Clinic. The National Cancer Control Programme set these clinics up, and they run at eight designated cancer centres nationally. The national target is for a referred patient to be seen within ten days. The plain chest x-ray is only a first filter. A normal x-ray doesn't rule out lung cancer, which is why a CT scan of the chest is the test that confirms or excludes the disease.
Here's the detail that catches services out. Under the HSE National Cancer Control Programme referral guidelines, a GP should refer a patient with persistent or concerning symptoms even where the chest x-ray is reported as normal. The HSE National Cancer Control Programme lists red-flag features that warrant referral. They include coughing up blood, a cough lasting more than three weeks, a change in a long-standing cough, unexplained chest pain or breathlessness, and unexplained weight loss 1. The guidelines also note that, in some hospitals, an abnormal x-ray may trigger a referral automatically. But that can't be assumed, and it's often where responsibility falls through a gap. If you had a clear chest x-ray but your symptoms continued, the safe step is to go back to your GP and ask about a CT scan or a Rapid Access Lung Clinic referral, because a normal x-ray on its own doesn't close the question.
In practice, a missed lung cancer on a chest x-ray breaks down into one of three failure points:
- The radiologist didn't report a nodule. The lesion was visible on the film but wasn't mentioned in the report.
- The report wasn't acted on. An abnormal finding was recorded, but no referral or recall followed. A radiologist can flag a nodule in the report, yet the result never reaches the right clinician or the patient is never recalled, so nothing happens.
- The referral was never made. A GP or hospital clinician relied on a normal x-ray and didn't send a symptomatic patient to a Rapid Access Lung Clinic for a CT scan.
This list helps you locate where a failure may have occurred. It isn't a test of whether you have a claim, and it doesn't predict any outcome.
How do you prove the radiologist was negligent?
Proving negligence starts with the standard the Irish courts apply to every doctor, set out in Dunne v National Maternity Hospital. A doctor is negligent only where they made an error that no competent practitioner of equal standing would have made, acting with ordinary care in the same circumstances. Applied to a chest x-ray, this becomes a question of visibility.
To answer it, your solicitor requests the original digital image files, not just the written report, through a data subject access request. Those images go to an independent consultant radiologist for a blind read, an assessment made without knowing the later diagnosis. The expert reviews the film without knowing what the cancer turned out to be. This matters. A small lung cancer is far easier to see in hindsight, once you already know it's there. So the expert has to say more than that the lesion was present in the pixels. They have to conclude that a reasonably careful radiologist, working under normal Irish hospital conditions, should have seen and reported it. Where the lesion was genuinely hidden by overlying anatomy, the case may fail here. Where it was visible and simply overlooked, the breach is made out.
A separate point arises where the reading was outsourced. Many Irish hospitals send non-urgent or backlog x-rays to private, off-site teleradiology providers. Under the Supreme Court decision in Morrissey v HSE, the HSE owes a non-delegable duty of care to its public patients. So it can't avoid responsibility by pointing to an outside contractor who misread the film. The claim still lies against the hospital. For the difference between a GP-side and a hospital-side failure, see our page on GP versus hospital cancer delay, and for imaging errors generally, radiology and imaging negligence.
The expert's job is to place the lesion on a spectrum, from genuinely occult (invisible to any careful radiologist) to negligently missed (clearly there and overlooked). Certain radiographic features tend to push a lesion toward one end or the other. These are the features that decide most chest x-ray cases.
| Feature on the film | Points toward genuinely occult | Points toward negligently missed |
|---|---|---|
| Size | Very small (a few millimetres) | Larger, around or above 1cm |
| Margins | Faint, poorly defined edges | A defined or irregular, spiculated edge |
| Density | Fainter than the surrounding structures | Denser, standing out against the lung |
| Overlap | Superimposed on a rib, the heart or central vessels | Sitting in clear lung, away from overlying structures |
| Prior films | No earlier x-ray to compare | An earlier film was available and would have shown change |
These features guide an expert's opinion. They aren't a self-assessment tool, and only a qualified radiologist can judge an individual film.
Did the delay change the outcome? Causation and the diagnostic gap
Showing that the x-ray was misread is only half a claim. You also have to show that the delay made a real difference, using the but-for test: but for the missed diagnosis, would the result have been materially better? If the cancer was already incurable at the time of the missed x-ray, the claim can fail on causation no matter how clear the breach. For how the Irish courts apply this, see our pages on the but-for test and loss of chance, an area that's still unsettled in Irish law.
The practical question is whether the period between the missed x-ray and the actual diagnosis, sometimes called the diagnostic gap, let the cancer advance to a less treatable stage. This matters because stage at diagnosis is the single biggest factor in lung cancer survival. According to the National Cancer Registry Ireland, lung cancer five-year net survival remains low overall, at around 15 per cent, and lung cancer accounts for about one in five cancer deaths in Ireland 11. This is also where lung cancer differs from some other cancers. Lung tumours, particularly non-small-cell lung cancer, can shift stage in a matter of months. A peer-reviewed Irish modelling study, which used National Cancer Registry Ireland stage and survival data to estimate the effect of a hypothetical delay in starting treatment, found that for non-small-cell lung cancer at stage I a three-month delay carried roughly a one-in-two modelled probability of an upward stage shift, rising to around three-in-four after six months 2. These are modelled probabilities rather than outcomes observed in missed-x-ray cases, but they illustrate why even a delay of a few months can matter in a lung cancer case, where the same delay might not matter in a slower-growing cancer.
The courts won't assume harm, though. Take Crumlish v HSE. The Court of Appeal dismissed a delayed cancer diagnosis claim at the first causation hurdle, because the medical evidence couldn't establish that earlier intervention would have changed the outcome 3. Independent oncology experts reconstruct how large and how advanced the tumour was likely to have been at the date of the missed x-ray. They often use tumour doubling time, the average period a tumour takes to double in volume, to work backward from its later size. Germaine v Day shows how hard this burden can be. A surveillance chest x-ray in October 2018 missed an opacity in the right lung, and the hospital admitted the breach. Yet the cancer was already incurable at that date, so the missed diagnosis hadn't changed the prognosis 4.
A simplified example shows how the diagnostic gap is assessed. Imagine a chest x-ray in January reported as normal, where a 9mm nodule was in fact visible in the right upper lobe. The patient returns with a worsening cough in August, and a CT scan shows a 30mm tumour with involved lymph nodes, now stage III. The expert questions are then twofold. Was the 9mm nodule visible and reportable in January? And would treatment at stage I in January, rather than stage III in August, have given a materially better prognosis? If the answer to both is yes, breach and causation line up. This example is illustrative only and not based on any individual case.
Who is liable when an Irish hospital misses your x-ray?
The claim almost always lies against the hospital or the HSE, not against an individual doctor. The State Claims Agency manages and defends public hospital claims under the Clinical Indemnity Scheme. As set out above, the HSE's non-delegable duty under Morrissey v HSE means it stays responsible even where an outsourced or locum radiologist read the x-ray. Where a GP relied on a normal x-ray and didn't refer a symptomatic patient onward, the GP's own practice may be the correct defendant instead. That's why identifying the exact failure point early matters. Our page on failure to refer for urgent investigation covers that scenario in detail.
It helps to know how these cases are usually defended. In a missed chest x-ray claim, the State Claims Agency tends to argue one of three things: that the lesion was genuinely occult and not reportable at the time, that the cancer was already incurable when the x-ray was taken so the delay changed nothing, as in Germaine, or that the tumour grew too slowly for the delay to have caused a stage shift, as argued in Crumlish. Strong, independent expert evidence on both visibility and tumour growth is what meets these defences. For the wider picture, see our page on common defences in medical negligence claims.
Has this actually happened in Ireland?
Yes. Missed findings on chest x-rays have triggered some of the largest radiology look-back reviews in the State, including cases where lung cancers went undiagnosed for more than a year. According to the published look-back review reported by The Irish Times, at University Hospital Kerry a review of 46,234 scans and x-rays from 26,754 patients, covering the work of a single locum consultant radiologist between 2016 and 2017, found that 11 patients had a cancer diagnosis delayed, and four of them had died by the time the report was published in December 2018 10. Two of those cases sit squarely within the topic of this page. One patient waited 76 weeks for a correct lung cancer diagnosis after a chest x-ray was misreported, and another had a lung cancer diagnosis delayed by 51 weeks, picked up only when a GP referred them for a repeat x-ray 10. [CITATION UNVERIFIED: the 76-week and 51-week individual case figures could not be confirmed against the publicly available Irish Times coverage or the Lookback Report summaries located; verify against the primary Lookback Report before publication — solicitor review required.]
It was not the first such review. A decade earlier, the HSE re-examined around 6,000 x-rays and 70 CT scans in the Louth-Meath hospital group, after concerns about a locum radiologist, where several patients whose chest x-ray abnormalities went unreported were later diagnosed with lung cancer. These reviews show a recurring pattern: a busy or under-supervised radiology service, an unreported finding, and a diagnosis that surfaces only when a second x-ray is finally taken. That pattern is exactly what an independent expert looks for when assessing whether an individual case was negligent.
Do you have a claim? What this means for your situation
If you've learned that an earlier chest x-ray showed something that wasn't reported or acted on, two questions decide a claim. Was the lesion visible to a careful radiologist at the time? And did the resulting delay change your treatment or prognosis? The short summary below brings the earlier sections together.
You may have a claim if: a nodule was visible in retrospect on your chest x-ray and a careful radiologist should have reported it, or a symptomatic patient with a normal x-ray wasn't referred onward, and the delay let the cancer advance to a less treatable stage.
A claim is harder if: the lesion was genuinely occult and hidden by overlying anatomy, the cancer was already incurable when the x-ray was taken, or the delay was too short to have changed the stage or outcome.
This is general guidance, not a verdict on your case. Only a review of your records and images by an independent expert can tell you whether you have a claim.
The sections below deal with the practical steps: the position for bereaved families, getting your records, what to do now, the time limit, the process, and what a claim can include.
Can the family claim if a missed x-ray led to a death?
Where a missed lung cancer led to a death, a dependent family member can bring a claim under Part IV of the Civil Liability Act 1961. It covers loss of financial dependency and reasonable funeral costs, together with a fixed statutory payment for mental distress, known as solatium, capped at €35,000 for the whole family to share. A separate claim for the deceased's own pain and suffering before death may also be possible.
One route is generally not open: a nervous shock claim by a relative who watched their loved one decline. In Germaine v Day, the High Court held that witnessing a gradual deterioration from terminal cancer wasn't the sudden, shocking event this kind of claim requires 4. The distinction is technical and fact-specific, and we cover it in full on our page about secondary victims and nervous shock.
How do you get your records and the open disclosure letter?
The starting evidence is your own medical file. You can request your records, including the original x-ray and CT images, through a data subject access request under data protection law, at no cost. The images themselves, not just the typed reports, are what an independent radiologist needs. Building a dated timeline of every x-ray, referral, symptom, and appointment is often what reveals where the failure happened.
You may also receive an open disclosure letter from the hospital. Since the Patient Safety (Notifiable Incidents and Open Disclosure) Act 2023 came into force on 26 September 2024, providers must hold an open disclosure for a defined, closed list of serious “notifiable incidents” set out in Schedule 1 of the Act — a list focused on specified deaths and certain maternity and neonatal events, which does not extend to a missed cancer diagnosis as such 5. A missed diagnosis identified in a hospital review may still be disclosed to the patient under the HSE’s broader open disclosure policy, and where it falls within a Schedule 1 category (for example a notifiable death) the statutory duty applies. An admission of a failure in care, as happened in Germaine, doesn't by itself prove a claim, because causation still has to be shown. But it's important evidence.
Steps to take now if you think your x-ray was missed
- Request your full medical records, including the original x-ray and CT images, through a data subject access request under the Data Protection Act 2018, at no cost.
- Write down your timeline, noting every x-ray, symptom, appointment, and what you were told and when.
- Note your date of knowledge, the point you first realised an earlier x-ray may have been missed, because the time limit runs from then.
- Get an independent radiology opinion, which a solicitor can arrange, to assess whether the lesion was visible and should have been reported.
- Mind the two-year limit, and take advice early, because gathering records and expert reports takes time.
How long do you have to claim?
A medical negligence claim in Ireland must generally be brought within two years less one day of your date of knowledge, not the date of the x-ray. The two-year limitation period is set by section 7 of the Civil Liability and Courts Act 2004; your date of knowledge — when you first knew, or reasonably should have known, that you had a significant injury linked to your care — is construed in accordance with the Statute of Limitations (Amendment) Act 1991 6. A missed x-ray is often discovered long after it was taken, so the start date can fall much later. The rule is strict, so it's worth confirming your own dates early. See date of knowledge for how this works.
What can a claim include?
A successful claim covers two things. General damages compensate for the pain, suffering, and reduced quality of life the delay caused. The court assesses them against the brackets in the Judicial Council Personal Injuries Guidelines 2021. The current ceiling for general damages in the most severe cases is about €550,000. A proposed 16.7 per cent increase hadn't been enacted as of mid-2026, so the 2021 figures still apply 7. Special damages cover financial losses, such as the cost of extra treatment, care, and lost earnings, and these aren't capped. Figures vary from case to case depending on the medical evidence. We don't publish compensation estimates or calculators, because no two cases are alike. For how damages are structured, see what a cancer misdiagnosis claim may include.
Unlike most personal injury claims, medical negligence claims don't go through the Injuries Resolution Board. They proceed directly to the courts, and since April 2025 are managed in a dedicated High Court clinical negligence list.
How long does a missed x-ray claim take, and what are the steps?
A medical negligence claim in Ireland takes around four years on average, though a straightforward case with clear liability can resolve faster, and a disputed one can take longer 8. The claim moves through a recognised sequence: collecting your records, obtaining an independent expert report, sending a letter of claim, issuing proceedings, discovery, mediation, and resolution. A missed chest x-ray case usually turns on two expert reports, one from a consultant radiologist on visibility and one from an oncologist on causation, so the expert stage is central.
Two High Court Practice Directions, HC131 and HC132, changed how these cases run from 28 April 2025 9. Clinical negligence cases now sit in their own dedicated list managed by a specialist judge. Before a party can apply for a trial date, the solicitor must sign a Certificate of Compliance confirming that pleadings are complete, expert reports have been exchanged, and mediation has been offered within three weeks of the trial date. Most claims settle rather than go to a full hearing, and mediation now resolves a large share of them. For the full picture, see our guides to the medical negligence claim timeline and mediation in medical negligence claims.
How we can help
We're personal injury and medical negligence solicitors based in Dublin, acting for clients across Ireland. We investigate missed chest x-ray cases by getting your original imaging and building a dated timeline. We then instruct an independent consultant radiologist and, where needed, an oncology expert to address both visibility and causation. If you'd like to talk it through in confidence, contact us for a consultation or call 01 9036408.
Frequently asked questions
What is a Rapid Access Lung Clinic?
A Rapid Access Lung Clinic is a fast-track hospital clinic a GP refers to when a chest x-ray or symptoms suggest possible lung cancer. Ireland has eight such centres, run under the National Cancer Control Programme, where the national target is to see a referred patient within ten days and arrange a CT scan 1.
Is every lung cancer missed on a chest x-ray automatically negligence?
No. A chest x-ray can't detect every lung cancer, and some lesions are genuinely hidden by overlying anatomy. A miss is judged against the Dunne standard, which asks whether a competent radiologist of similar standing should have seen and reported the lesion under normal conditions. Hindsight that the cancer was there isn't enough on its own.
Can I still claim if my chest x-ray was reported as normal?
Possibly. A normal x-ray doesn't rule out lung cancer. Under HSE National Cancer Control Programme guidelines, a patient with persistent or concerning symptoms should be referred onward for a CT scan even where the x-ray was normal 1. Not referring in that situation can be a breach of duty.
How is an Irish lung cancer referral different from the UK two-week-wait?
Ireland doesn't use the UK's NHS two-week-wait system. Irish referrals run through the National Cancer Control Programme into Rapid Access Lung Clinics, with their own criteria and a ten-day target for being seen 1. UK guidance and case law don't set the standard for an Irish claim.
How long do I have to make a claim?
Generally, two years less one day from your date of knowledge. That's when you first knew, or should reasonably have known, that you had a significant injury connected to your care 6. A missed x-ray is often discovered later, so that date can fall well after the x-ray was taken.
Who pays the compensation if a locum or outsourced radiologist misread the x-ray?
For a public hospital patient, the HSE owes a non-delegable duty of care under Morrissey v HSE. So the State Claims Agency pays on the HSE’s behalf, even where an outsourced, locum or off-site teleradiology provider read the film. You don't have to pursue an outside contractor separately.
What evidence do I need to start a missed chest x-ray claim?
You need your medical records, and crucially the original digital x-ray and CT images, not just the typed reports. You can request these through a data subject access request at no cost. An independent consultant radiologist then reviews the original film to assess whether the lesion was visible and should have been reported.
My chest x-ray was outsourced abroad. Can I still claim in Ireland?
Yes, for a public hospital patient. Because the HSE's duty of care is non-delegable, you claim against the Irish hospital, and the State Claims Agency defends it. You don't have to bring a separate claim against a foreign or private teleradiology company, even where that company read the film.
References
- Health Service Executive, National Cancer Control Programme. Lung Cancer Rapid Access Service GP Referral Guidelines and Form (accessed June 2026).
- Zhang M, Tierney P, Brennan A, Murray D, Mullooly M, Bennett K. "Modelling the impact of the COVID-19 pandemic on cancer stage migration and excess mortality in Ireland", Preventive Medicine Reports (2025), using National Cancer Registry Ireland stage and survival data to model a hypothetical three- and six-month delay in time to treatment initiation. peer-reviewed study (PMC) (accessed June 2026).
- Crumlish v Health Service Executive [2024] IECA 244, Court of Appeal. Causation in delayed cancer diagnosis. Judgment via Courts Service of Ireland (accessed June 2026).
- Germaine v Day [2024] IEHC 420, High Court (Ms Justice Egan, 10 July 2024). Missed lung cancer on chest x-ray, breach admitted, on causation and nervous shock. Judgment via Courts Service of Ireland (accessed June 2026).
- Patient Safety (Notifiable Incidents and Open Disclosure) Act 2023, commenced 26 September 2024. Irish Statute Book (accessed June 2026).
- Civil Liability and Courts Act 2004, section 7 (two-year limitation period for personal injuries actions), with date of knowledge construed in accordance with the Statute of Limitations (Amendment) Act 1991, section 2. Irish Statute Book (accessed June 2026).
- Judicial Council, Personal Injuries Guidelines (2021), status of the proposed uplift as of 2026. Personal Injuries Guidelines (PDF) (accessed June 2026).
- Average duration of an Irish medical negligence claim (approximately four years), Medical Protection Society research (2024), as reported in Irish legal analysis. See the firm's medical negligence claim timeline guide (accessed June 2026).
- High Court Practice Directions HC131 (Clinical Negligence Actions: Applications for Trial Dates) and HC132 (Clinical Negligence List), effective 28 April 2025. Via Courts Service of Ireland (accessed June 2026).
- University Hospital Kerry radiology look-back review (report published December 2018), reported by The Irish Times; earlier Louth-Meath radiology review (2008) reported by RTÉ News (accessed June 2026).
- National Cancer Registry Ireland, lung cancer five-year net survival (Cancer Trends 27, Lung cancer) and lung cancer share of cancer deaths (Cancer in Ireland 1994-2022, Annual Statistical Report 2024). National Cancer Registry Ireland (accessed June 2026).
This information is for educational purposes only and does not constitute legal advice. Every case is different and outcomes vary. Consult a qualified solicitor for advice specific to your situation. Reviewed June 2026 for the law of the Republic of Ireland.
Gary Matthews Solicitors
Medical negligence solicitors, Dublin
We help people every day of the week (weekends and bank holidays included) that have either been injured or harmed as a result of an accident or have suffered from negligence or malpractice.
Contact us at our Dublin office to get started with your claim today
