Laboratory and Pathology Misreporting Claims

What laboratory and pathology “misreporting” means in practice

Misreporting occurs when the information provided by a testing service does not accurately reflect your true condition. While the outcome for the patient is often the same,a wrong diagnosis,the way these errors happen differs significantly between general laboratories and pathology departments.

• Laboratory misreporting typically involves factual data errors. These are often automated tests (like blood counts or biochemistry) where a machine or process fails,for example, a sample is labelled with the wrong name, or a machine is not calibrated correctly, producing a number that is objectively wrong.
• Pathology misreporting, by contrast, is often a human error of interpretation. Here, a consultant pathologist looks at tissue or cells under a microscope to decide if they look cancerous or healthy. If they miss subtle signs of disease that a competent doctor should have spotted, this is a subjective failure of professional judgement rather than a machine error.

Misreporting vs missed follow-up (two different failure points)

It is important to distinguish between a reporting error and a follow-up error, as they often involve different standards of legal proof.

• Misreporting: The laboratory or pathologist made a mistake in the analysis or the written report itself. The doctor received wrong information.
• Missed Follow-Up: The laboratory report was correct and flagged an issue, but the treating doctor or administrative team failed to read it, act on it, or inform the patient.

How lab and pathology errors can happen

A sample goes on a significant journey from the moment it leaves the patient’s body to the moment a result appears on a computer screen. Errors can occur at the pre-analytical stage (before testing), the analytical stage (during testing), or the post-analytical stage (after testing). Identifying exactly where the breach occurred is a vital part of our investigation.

Sample collection and identification

The process begins at the bedside or in the clinic. The most common risk here is misidentification. If a blood vial is labelled with the wrong patient sticker, or if a sample is placed in the wrong type of preservative fluid, the laboratory may be unable to analyse it, or worse, may generate a valid result for the wrong person.

Transport and storage

Samples are biological materials that can degrade. If a sample is left in a collection box too long, exposed to extreme temperatures during transport to the lab, or lost in transit, the sample may become unviable. Sometimes, a lab may attempt to process a degraded sample without realising it, leading to inaccurate readings.

Processing and analysis

This is the technical phase inside the laboratory. Machines must be calibrated correctly, and reagents (chemicals used for testing) must be within their expiry dates. In pathology, this involves slicing tissue samples thinly and staining them with dyes so they can be viewed. If the technical preparation is poor, the pathologist may struggle to see the cells clearly.

Reporting and transcription

Once the analysis is done, a human or a computer system must generate the report. In pathology, this often involves dictation. Errors can occur if a dictated report is transcribed incorrectly (e.g., typing "no carcinoma" instead of "new carcinoma") and is not proofread before being signed off.

Communication to the treating team and the patient

A correct result is useless if it does not reach the right person. Failures often happen here, such as critical results being faxed or emailed to a doctor who is on leave without a cover system, or IT systems failing to upload the result to the patient's electronic record.

Action and follow-up (referral, repeat testing, treatment changes)

Finally, the circle closes when the doctor acts. If a report suggests a sample was "insufficient," the standard of care usually dictates an immediate repeat test. If this recommendation is ignored or missed, a diagnosis can be delayed significantly.

Common types of laboratory/pathology misreporting errors

While the majority of tests in Ireland are accurate, specific types of errors do recur. Understanding the mechanism of the error is the first step in establishing if clinical negligence was involved.

• Wrong patient/wrong sample errors: This is often considered a "never event" in healthcare safety protocols. It involves labelling errors where Patient A’s blood is tested under Patient B’s name. This can lead to Patient B receiving treatment for a condition they do not have, while Patient A goes untreated.
• False negative / false positive results:
  • False Negative: The test reports "normal" or "benign" when the disease is actually present. This gives false reassurance and delays treatment.
  • False Positive: The test reports disease when none is present. This can lead to unnecessary surgery, chemotherapy, or significant psychological distress.

• Interpretation errors in pathology reporting: Pathology is subjective and relies on the skill of the consultant. However, there is an accepted range of competence. If a pathologist misses obvious signs of malignancy that a reasonable body of pathologists would have spotted, this may constitute a breach of duty.
• Administrative/IT and results-routing failures: Modern hospitals rely on complex IT networks. Errors occur when systems crash, when interfaces between the lab and the GP surgery fail, or when paper reports are filed in the wrong chart without being signed off by a clinician.
• Borderline findings and the need for correlation/second review: Some samples are difficult to read. In these cases, the standard of care often requires the pathologist to seek a second opinion from a colleague or to classify the result as "uncertain" rather than "normal." firmly categorising an ambiguous sample as "benign" without caveats can be a source of negligence.
• Delayed reporting and delayed escalation of critical results: Laboratories often have specific protocols for "critical values" (results that indicate an immediate threat to life). If a lab technician identifies a critical value but simply posts the report via routine mail rather than phoning the ward or GP immediately, the delay in acting can be fatal.

Conditions most commonly affected

Certain medical conditions rely more heavily on pathology and laboratory diagnostics than others. In these areas, the accuracy of the report is the primary factor in determining the patient's future.

Cancer pathways

Cancer care is entirely dependent on pathology. A reporting error here can mean a cancer is missed (delayed diagnosis), or that the "grade" of the cancer is underestimated, leading to less aggressive treatment than is actually required.

See our approach to Oncology and Cancer Claims.

Infection and sepsis risks

In cases of sepsis or meningitis, the lab must identify the specific bacteria quickly so the right antibiotic can be used. A false negative culture or a delay in processing spinal fluid can have devastating consequences for infection control and patient survival.

Blood transfusion and “wrong blood in tube” risks

Transfusion requires absolute precision. If a patient receives incompatible blood due to a grouping error, the immune reaction can be life-threatening. Strict protocols exist to prevent "wrong blood in tube" incidents. Failure to follow them is serious.

Read more about Haematology and Blood Related Claims.

Inflammatory bowel disease vs bowel cancer workups

Distinguishing between chronic inflammation (like ulcerative colitis) and early bowel cancer relies heavily on the pathologist’s interpretation of biopsy samples taken during a colonoscopy. Misinterpreting early cancerous changes as simple inflammation can delay life-saving surgery.

Women’s health screening and diagnostic pathways

Screening programmes (such as for cervical or breast health) involve processing massive volumes of samples. While these programmes save many lives, screening errors do happen, where abnormal cells are categorised as normal during the checking process.

Signs there may have been a reporting or results error

Patients often have an instinct that something is not right before an error is officially confirmed. While not every delay is due to negligence, there are common red flags that suggest a review of the diagnostic history is warranted.

• Conflicting results across appointments: If a hospital test says one thing, but a private clinic or a later test says the complete opposite regarding the same issue, it raises the question of whether the first interpretation was correct.
• Symptoms persist despite “normal” findings: If you are told your tests are "clear," but your symptoms (such as a lump, pain, or bleeding) continue to worsen significantly over time, it is possible the initial test was a false negative or the sample was insufficient.
• Sudden change after a delayed diagnosis: A common scenario involves a patient being told for months that they are fine, only to be diagnosed later with advanced disease that "should have been seen" earlier.
• You were not told results, or results appear in records later: If you find a letter or report in your medical history that mentions an abnormality you were never informed about, a breakdown in communication likely occurred.
• A second clinician questions the earlier report: It is significant if a new doctor reviews your old slides or results and comments that the original report looks incorrect.

What to do if you suspect a lab or pathology report was wrong

If you are concerned that a misdiagnosis or injury has resulted from a testing error, taking methodical steps can help clarify the situation.

• Request copies of relevant records: Under data protection laws, you have the right to access your medical file. Ask specifically for the laboratory reports and the referral letters. Seeing the dates on these documents is often the first step in building a timeline.
• Ask how results were communicated and documented: Consider a clinical second opinion: You can ask for your pathology slides (the physical glass slides) or scans to be reviewed by a different hospital or consultant. This is a standard medical request and can determine if the original reporting was accurate.
• Keep a written timeline (dates of tests, calls, appointments)
• Preserve details where pathology is involved: Pathology samples are physical items stored in archives. It is vital to know which hospital laboratory holds the sample, as these may need to be re-examined by an independent expert later.

When can a laboratory/pathology error amount to clinical negligence in Ireland?

In Irish law, a mistake is not automatically negligence. To bring a successful claim, we must demonstrate that the error was one that no competent laboratory or pathologist of ordinary skill would have made if acting with ordinary care.

Duty of care and standard of care

The laboratory owes you a duty of care to process and report your sample accurately. We assess the "standard of care" by asking: Would a reasonably competent pathologist/scientist have made this same error? If the answer is no, negligence may be established.

Causation (did the error change the outcome?)

This is often the most complex part of a case. We must prove that the error directly caused harm. For example, if a cancer diagnosis was delayed by two months due to a lab error, but medical experts agree that the treatment and outcome would have been exactly the same despite the delay, "causation" may not be proven. We must show the delay made the condition worse.

Evidence: records + independent expert review

We build a case by obtaining your records and sending them to independent experts (often from the UK or abroad) to provide an objective opinion on whether the original reporting fell below acceptable standards.

Sometimes the blame is shared. The lab may have issued a confusing report, but the GP may also have failed to clarify it. We investigate all providers involved to ensure the correct parties are held accountable.

Learn more about General Practice (GP) Claims.

Time limits

Generally, the Statute of Limitations in Ireland requires a claim to be commenced within two years.

• This two-year clock usually starts from the date of the injury or the "date of knowledge" (the date you first discovered, or ought to have discovered, that an error had occurred).
• Determining the "date of knowledge" in pathology cases can be legally complex.
• Exceptions exist (e.g., for children or those without mental capacity), but you should never assume an exception applies without legal advice.

Beyond legal deadlines, practical urgency matters. Pathology slides can sometimes be discarded after retention periods expire, and audit logs (showing who viewed a result) may be deleted by IT systems over time. Securing this evidence early is vital.

Other options alongside (or instead of) a claim

Litigation is not the only route to answers. Depending on your goals, other avenues may be appropriate.

• HSE complaints processes and hospital feedback routes: If you are seeking an apology or an explanation of how a system failed, filing a formal complaint through the HSE ‘Your Service Your Say’ or the private hospital’s complaints officer can trigger an internal investigation.
• Professional regulator routes: In cases of severe professional misconduct or incompetence, a complaint can be made to the Medical Council (for doctors) or CORU (for other health professionals). This deals with the practitioner's fitness to practise rather than compensation.
• Open disclosure conversations (where offered): Irish healthcare policy encourages Open Disclosure,a formal meeting where doctors explain that an adverse event has occurred and apologise. While this is not a legal admission of liability, it can provide transparency.

How Michael Boylan LLP can assist

At Michael Boylan LLP, we are recognised as leading practitioners in the field of medical negligence. We approach laboratory and pathology claims with sensitivity, precision, and a deep understanding of the medical science involved.

• What an initial review typically involves: We start by listening to your story. If the case merits investigation, our team will take up the burden of requesting your medical records and analysing them to create a detailed chronology of events.
• Coordinating independent medical opinion: We have access to a network of highly qualified independent medical experts (pathologists, haematologists, microbiologists) who can re-examine your samples and reports to provide an unbiased opinion on the standard of care.
• Handling complex multi-provider timelines: Pathology claims often involve a patient moving between GPs, public hospitals, and private clinics. We are experienced in unravelling these complex trails to identify exactly who was responsible for the breakdown in your care.

FAQs

Can a pathology report be reviewed or re-checked?

Yes. It is standard practice to request a review of previous pathology slides, especially if your diagnosis changes or if you are moving to a new treatment centre.

What is the difference between a lab error and a follow-up failure?

A lab error means the result itself was wrong (e.g., misinterpretation). A follow-up failure means the result was correct, but the doctor or system failed to act on it (e.g., the letter was lost).

What records should I request first?

You should request the specific laboratory reports (blood results, biopsy reports) and the clinical notes from the doctor who ordered them. This helps establish what information was available at the time.

Do screening tests guarantee cancer detection?

No. Screening tests (like CervicalCheck or BowelScreen) are designed to reduce risk across a population, but they are not 100% accurate. They have recognised margins of error and limitations.

What if I only discovered the issue months or years later?

The two-year time limit for legal claims generally starts from the date you knew (or should have known) that an error occurred, rather than the date of the test itself. However, establishing this date is a strict legal test.

Can more than one provider be responsible?

Yes. It is possible for a laboratory to be partially responsible for a confusing report and a GP to be partially responsible for not seeking clarification.

Do you have questions about a laboratory or pathology result?

If you or a loved one has suffered due to a suspected misreporting or diagnostic error, prompt advice is essential.

Contact Michael Boylan LLP today.

We can arrange an initial consultation to discuss your concerns in confidence and help you understand your options.

*In contentious business, a solicitor may not calculate fees or other charges as a percentage or proportion of any award or settlement.