County Durham NHS Trust Expands Breast Cancer Review to Thousands of Earlier Cases

A major review into breast cancer care at County Durham and Darlington NHS Foundation Trust is being expanded after serious concerns were identified in the treatment of patients.

The trust has agreed to examine up to 4,500 additional cases, potentially extending the investigation back to 2015. The decision follows findings that patients experienced harm, including delayed diagnoses and surgery that was later considered unnecessary.

The review could take around five years to complete because cases will be examined retrospectively, one year at a time. The development represents a significant expansion of an investigation that initially focused on patients treated between January 2023 and February 2025.

Concerns over breast cancer treatment

County Durham and Darlington NHS Foundation Trust provides healthcare services across County Durham and Darlington. Concerns about its breast services have developed over several years.

According to the trust, issues were identified following feedback from clinical audit programmes and external reviewers. The organisation began a formal review of its breast services in 2025.

The concerns have included questions about whether some patients received treatment consistent with accepted clinical practice. Other issues have involved delays in diagnosis and cases where patients underwent more extensive surgery than was considered necessary.

Earlier investigations have also identified cases involving unnecessary mastectomies. Reports in September 2026 said that 20 women had undergone mastectomies that were later considered unnecessary, while hundreds of other patients had experienced some form of harm.

For women undergoing breast cancer treatment, decisions about surgery can have consequences that extend far beyond the immediate medical procedure. Surgery may affect physical appearance, recovery, emotional wellbeing and future treatment options.

That is why the trust's latest decision to examine a much larger group of historical cases is significant.

What has the review found so far?

The initial look-back exercise examined hundreds of patient records from the period between 2023 and early 2025.

Figures released by the trust and reported in September showed that hundreds of cases had involved some degree of patient harm. The figures have changed as the review has progressed, reflecting the ongoing nature of the investigation and additional cases being assessed.

The review has identified different levels of harm, ranging from less serious cases through to severe outcomes. At least one patient death has also been identified among the cases reviewed.

There have also been cases involving delayed or missed diagnoses. In some circumstances, delays in identifying cancer can affect the treatment pathway available to a patient.

The trust has said that each case needs to be assessed individually by appropriate clinical specialists. This is important because a finding of concern in one case does not automatically mean that the same issue occurred in every patient treated during the same period.

Why is the review being extended?

The original investigation did not cover the entire period during which concerns had been raised about the breast service.

The trust has now agreed to work backwards through previous years, potentially reaching 2015. The expanded programme could involve approximately 4,500 additional cases.

Based on the current pace of around 80 case reviews each month, the wider investigation could take approximately five years.

Reviewing thousands of historical medical records is a complex process. Specialists need to examine clinical notes, diagnostic information, imaging, treatment decisions and other relevant evidence before reaching conclusions about individual cases.

The trust says the work will be supported by independent specialist clinical review and formal governance arrangements.

This approach is intended to provide a consistent process for determining whether individual patients received appropriate care and whether further action may be required.

Patients have been seeking answers

The situation has also led patients and families to seek explanations about what happened to them.

A dedicated support service has been established by the trust for people who have concerns about their breast care. The organisation says patients can contact the service even if they were treated outside the period initially covered by the look-back.

The trust has said that patients do not need to contact the service simply because they previously received breast treatment. However, anyone worried about their care can raise their concerns with the dedicated team.

Where a review identifies a concern about an individual's treatment, the trust says the patient will be contacted and given information about the findings and any further support or clinical care that may be appropriate.

This is particularly important for people who may not have known that their treatment was being examined.

An apology from the trust

Trust leaders have publicly apologised to patients and their families.

The organisation has acknowledged that failures in its breast services caused distress, uncertainty and harm to some patients. Chief executive Steve Russell has also said the trust recognises that it should have listened more carefully to concerns, asked more questions and acted sooner.

An apology cannot change medical treatment that has already taken place, but the trust says it is committed to supporting people affected by the failures.

The organisation has also pointed to changes made within the breast service in an effort to improve patient care.

According to the trust, fewer patients now require diagnostic surgery and more cancer operations involve advanced oncoplastic techniques. These procedures can combine cancer treatment with techniques intended to improve reconstruction and recovery.

What happens next?

The expanded review is expected to proceed gradually, with historical cases examined year by year.

The scale of the exercise means it will not produce answers immediately. Each patient's records need to be reviewed carefully, and clinical conclusions must be based on the evidence available in that particular case.

The investigation could ultimately provide a clearer picture of how widespread the problems were and whether patients treated before 2023 were also affected.

It may also help identify lessons about clinical governance, leadership and how concerns raised by patients or external organisations are handled.

The trust has said that learning from the review will be used to strengthen its breast services and prevent similar problems from occurring in the future.

For patients and families affected by the situation, however, the process is also about understanding what happened to them individually.

The expansion to potentially 4,500 additional cases means many more former patients may now have their treatment examined. While the process could take several years, it represents a much broader attempt to establish whether earlier problems affected patients beyond those already identified.

A wider issue for NHS healthcare

The situation also highlights the importance of clinical oversight and early action when concerns emerge within specialist services.

Healthcare systems rely on multiple safeguards, including clinical audits, professional reviews, complaints procedures and internal governance. When concerns continue over an extended period, questions can arise about whether those safeguards worked effectively.

The County Durham review is therefore not simply about examining individual medical records. It is also examining how concerns about the service were identified, communicated and acted upon.

The trust has said that learning from these issues will form part of its work to improve services.

For now, the expanded look-back will be closely watched by patients, families and healthcare organisations as specialists work through thousands of historical cases.

The central question is whether further patients were affected and, where concerns are identified, what support and explanations can be provided.

Sources

• County Durham and Darlington NHS Foundation Trust, Breast Surgery Services Review.
• County Durham and Darlington NHS Foundation Trust, Breast services: patient support, service improvements and next steps.
• BBC News, reporting on the expansion of the breast cancer case review, as supplied in the source material.
• Sky News, NHS Trust to review breast cancer cases over more than a decade after failings.
• ITV News Tyne Tees, reporting on the proposed expansion of the review.
• Royal College of Radiologists, Review of symptomatic breast imaging services delivered by County Durham and Darlington NHS Foundation Trust.

Disclaimer

This article is intended for general information and news-reporting purposes only. It does not constitute medical, legal or professional advice. Individual patient circumstances can differ substantially, and findings from an ongoing review should not be interpreted as applying to every person treated by the trust. Readers with concerns about their own medical care should seek advice from an appropriately qualified healthcare professional or contact the relevant NHS service.