When a breast cancer diagnosis arrives later than it should have, the consequences reach beyond the clinical.
A cancer caught at Stage I carries a very different prognosis from one identified at Stage III.
Treatment options narrow, recovery becomes harder, and the toll on a person and their family is measurably greater.
If you have been told that your diagnosis was delayed, that an abnormality was missed on a mammogram or biopsy, or that a referral did not happen when it should have, you are likely asking whether that delay made a difference to your outcome. In many cases, it did.
Kathrin Coleman and the medical negligence team at Coleman Legal LLP in Ireland act for those who have been affected by a delayed or missed breast cancer diagnosis.
We review the clinical records, commission expert oncology reports, and advise you on your position, clearly and without pressure.
Breast cancer misdiagnosis claim
A breast cancer misdiagnosis claim arises where a healthcare provider failed to meet the standard of care owed to a patient in the diagnosis or investigation of breast cancer, and that failure caused or contributed to harm.
According to the National Cancer Registry Ireland (NCRI), approximately 3,600 women and 25 men are diagnosed with breast cancer in Ireland each year, with three in four cases occurring in people aged over 50.
BreastCheck, the HSE national breast screening programme, invites women aged 50 to 69 for a mammogram every two years.
A breast cancer misdiagnosis claim may arise where a GP failed to refer a patient with concerning symptoms, a radiologist did not identify an abnormality on a mammogram, Breast Check returned a false negative result, or biopsy findings were not followed up promptly.
The State Claims Agency reported EUR 210.5 million in clinical damages paid in 2024, with diagnosis errors among the most prominent categories of claim.
A failure to diagnose breast cancer at the appropriate stage is one of the most serious forms of medical negligence because the harm is directly linked to disease progression.
If you have been affected by a delayed or missed breast cancer diagnosis, it may be possible to bring a breast cancer misdiagnosis claim. Coleman Legal LLP can advise you on whether the circumstances of your case support a claim.
The date of knowledge rule in breast cancer misdiagnosis cases
The Statute of Limitations (Amendment) Act 1991 introduced the ‘date of knowledge’ rule for personal injury claims in Ireland.
Under this rule, the two-year limitation period begins not from the date the negligence occurred, but from the date on which the patient knew, or ought reasonably to have known, that they had suffered a significant injury attributable to the act or omission of another person.
In breast cancer misdiagnosis cases, this distinction is important.
A patient may have received a false negative mammogram result several years before the cancer was correctly diagnosed.
The clock does not necessarily start on the date of that incorrect result.
It typically starts when the patient first becomes aware, or ought to have become aware, that the earlier result may have been wrong and that the delay contributed to a worse outcome.
This can arise when a treating oncologist raises the issue, when a patient receives a copy of their earlier clinical records, or when legal advice is first sought.
If you are concerned that time may have passed since a delayed diagnosis, you should seek advice promptly.
The limitation rules in this area are technical and depend on the specific facts of each case.
Breast cancer misdiagnosis claim process
1. Consult our solicitor
It is advisable for you to speak to an experienced team of breast cancer misdiagnosis claim solicitors as soon as possible if you believe that you were not provided with an adequate or appropriate level of medical care, which resulted in you sustaining an injury or illness.
2. We obtain your medical records
After the consultation with your medical negligence solicitor, he/she will request access to your medical records and engage an independent medical expert to assess your records.
The purpose of engaging an independent expert is to establish whether there was any negligence on the part of the medical professional.
3. The medical negligence litigation process
Where the independent medical expert is of the professional opinion that medical negligence did occur, upon your instructions, your solicitor will commence the process of issuing legal proceedings in Court against the medical professional and/or hospital.
Statute of Limitation
Medical negligence claims in Ireland are subject to the Statute of Limitations (Amendment) Act 1991.
The general rule is that a claim must be brought within two years.
However, the starting point of that two-year period depends on when the injured person first knew they had sustained a significant injury resulting from an act or omission by another person.
In breast cancer misdiagnosis cases, that date is often later than the date of the original missed or incorrect diagnosis.
Where a patient was not aware that an earlier result was wrong until the cancer was found at a later and more advanced stage, the limitation period may run from the point at which that knowledge could reasonably have been acquired.
Each case turns on its own facts. Coleman Legal LLP can advise you on the limitation position in your specific circumstances. You should not assume that time has run without first obtaining legal advice.
Frequently Asked Questions
What is a breast cancer misdiagnosis claim in Ireland?
A breast cancer misdiagnosis claim is a form of medical negligence claim brought where a healthcare provider failed to diagnose breast cancer at the appropriate time, or provided an incorrect diagnosis, and that failure caused or contributed to harm.
The types of error that most commonly give rise to a claim include a GP failing to refer a patient with a palpable lump or other clinical indicators, a radiologist failing to identify an abnormality on a mammogram, a false negative result returned by the BreastCheck national screening programme, or a failure to follow up on biopsy results within an appropriate timeframe.
Not every missed or delayed diagnosis will support a claim.
The test is whether a reasonably competent healthcare provider in the same position would have acted differently, and whether that different action would have led to an earlier diagnosis with a materially better outcome.
How does a delayed breast cancer diagnosis affect a claim?
The timing of a diagnosis directly affects the strength and value of a breast cancer misdiagnosis claim.
Cancer staging is central to this. A cancer identified at Stage I, when it is small and localised, carries substantially better survival rates and requires less aggressive treatment than a cancer identified at Stage III or IV.
If a delay in diagnosis allowed the cancer to progress from an earlier to a later stage, that progression is the measurable harm at the centre of the breast cancer misdiagnosis claim.
The date of knowledge rule under the Statute of Limitations (Amendment) Act 1991 also affects timing of the claim itself.
The two-year period for bringing a claim typically runs from when the patient first knew, or ought reasonably to have known, that their diagnosis was delayed and that the delay contributed to a worse outcome.
This means claims are not automatically time-barred simply because the original missed diagnosis occurred several years ago.
What types of errors lead to a breast cancer misdiagnosis claim?
The most common categories of error in breast cancer misdiagnosis cases in Ireland are
- A GP failing to refer a patient with symptoms such as a lump, skin changes, nipple discharge, or persistent pain;
- A radiologist or reporting doctor failing to identify an abnormality on a mammogram or ultrasound;
- A false negative result issued by the BreastCheck programme (women aged 50 to 69 are invited for screening every two years);
- A failure to arrange or follow up a biopsy after an inconclusive imaging result; and
- A failure to communicate results or next steps to the patient within a clinically appropriate timeframe.
Each type of error involves a different standard of care and a different approach to gathering expert evidence.
Coleman Legal LLP works with oncology and radiology experts to identify which standard was breached and how that breach affected the patient’s outcome.
Does a breast cancer misdiagnosis claim go through PIAB?
No. Breast cancer misdiagnosis claims are medical negligence claims and are exempt from the Personal Injuries Assessment Board (PIAB) process under section 3(3) of the Personal Injuries Assessment Board Act 2003. PIAB assesses claims arising from accidents, not clinical negligence.
A breast cancer misdiagnosis claim is brought directly through the court system, typically in the High Court, given the level of damages involved.
Coleman Legal LLP will manage the full litigation process on your behalf, from the initial review of records through to settlement or trial.
What is involved in bringing a breast cancer misdiagnosis claim?
Bringing a breast cancer misdiagnosis claim involves several stages.
First, all relevant clinical records are obtained, including GP records, hospital notes, imaging results, biopsy reports, and any correspondence from BreastCheck.
Second, an oncology expert and, where relevant, a radiology expert review the records and prepare a report on the standard of care and whether any breach contributed to a worse outcome.
Third, a causation report links the breach of care to the specific harm suffered, including the impact on staging, treatment, prognosis, and quality of life.
Fourth, High Court proceedings are issued, and the case proceeds through the litigation process, which may be resolved by settlement at any stage.
The process requires detailed preparation and expert evidence. Coleman Legal LLP handles all stages of this process.
