The Surgeon Who Invented His Own Operation: Ian Paterson and Over 1,000 Victims

Somewhere in the span between 1993 and 2011, Ian Paterson performed a procedure he had invented himself on hundreds of women who had been diagnosed with breast cancer. He called it the cleavage-sparing mastectomy. National guidelines for breast cancer surgery are precise on this point: when performing a mastectomy, no breast tissue should be left behind, because residual tissue provides a site for cancer to recur. Paterson’s modification deliberately left tissue around the cleavage for cosmetic reasons. He did not tell his patients he was doing this. They believed they were receiving standard, guideline-compliant surgery. They believed they had been treated.

Many of them had not. The cancer returned. Women who thought they had survived breast cancer discovered years later that the tissue in which it had originated was still there, that it had been there all along, and that the surgeon who had operated on them had known that when he closed the incision and sent them to recovery.

Eighteen Years, Two Settings

Paterson worked as a consultant breast surgeon in the West Midlands, practising in both National Health Service hospitals and private clinics. His NHS employers were the Heart of England NHS Foundation Trust, where he operated at Heartlands Hospital, Solihull Hospital, and Good Hope Hospital. His private work was conducted at the Spire Parkway Hospital in Solihull and Spire Little Aston in Sutton Coldfield.

The dual-setting career mattered because the oversight mechanisms in the two environments differed. NHS practice involves peer review, mortality and morbidity meetings, and a governance infrastructure that, while imperfect, creates opportunities for aberrant patterns to be detected. Private practice in Paterson’s era offered fewer of these structures. Some of his most serious harm was done in the private setting, away from the collegial oversight that might have caught it sooner.

Concerns were first raised about Paterson in 2003, when colleagues at one of his NHS hospitals began to notice outcomes that seemed inconsistent with standard surgical expectations. Those concerns were not acted upon with any urgency. By 2007, enough had accumulated that he was told to stop performing cleavage-sparing mastectomies. He was told. He was not suspended. He was not reported to the General Medical Council. He continued to practise. He continued to see patients. Complaints from GPs and patients followed over the next several years. In 2011, he was suspended from NHS practice, but continued to perform both breast and general surgery at his private facilities for weeks afterward.

The Two Kinds of Harm

Paterson’s crimes fell into two distinct categories, and understanding both is essential to grasping the scale of what he did.

The first was the cleavage-sparing mastectomy performed on cancer patients. By leaving breast tissue behind in women who had active cancer, he created a high risk of recurrence. Several of his patients whose cancer returned subsequently died. In those cases, what had appeared at first to be a cosmetically refined variant of standard surgery was, from the perspective of outcome, a procedure that did not treat the disease it was supposed to treat. The patients consented to a mastectomy. They received something else.

The second category was unnecessary surgery performed on patients who did not have cancer at all. Paterson diagnosed or strongly implied pre-cancerous conditions in women whose lumps were benign, then performed operations that left them with physical and psychological scars from procedures they never needed. Some of these patients lived for years believing they had been saved from cancer that was never there.

An independent review commissioned after his conviction examined over 11,000 patient cases. It found that more than 1,000 patients had received operations that were unnecessary or involved an unapproved technique. The NHS made settlement payments to approximately 750 patients totalling over £37 million in the period immediately after conviction. The Spire group established a separate compensation fund for patients treated in its private hospitals.

The Conviction and Its Aftermath

Paterson was tried at Nottingham Crown Court in 2017. He was convicted of twenty counts of wounding with intent relating to surgical procedures on ten private-sector patients between 1997 and 2011. He was initially sentenced to fifteen years in prison. The Court of Appeal subsequently increased his sentence to twenty years, finding the original term insufficient given the scale and deliberateness of his conduct.

The criminal charges covered only a fraction of his total victims, those in the private sector for whom the evidence was most direct. The much larger group of NHS patients who received the cleavage-sparing mastectomy were addressed through the civil compensation process rather than the criminal prosecution, a distinction that reflects practical constraints on criminal proceedings rather than a judgment about the severity of the harm.

Sixty-two inquests into the deaths of Paterson’s patients were scheduled at Birmingham and Solihull Coroner’s Court in the years following his conviction. One of the first was into the death of Chloe Nikitas, who had undergone a cleavage-sparing mastectomy in 2002 and whose cancer returned in the same breast in 2005. She died in 2008 at age forty-three. Her partner told the inquest that Paterson had presented the procedure as a pioneering advance, offered no warning of any increased risk of recurrence, and that they had understood it to be the best available option.

Informed Consent as a Legal and Ethical Requirement

The Paterson case generated substantial legal commentary around the doctrine of informed consent. In English and Welsh law, valid consent to a medical procedure requires that the patient be told, in terms they can understand, what the procedure involves, what alternatives exist, and what the material risks are. A patient cannot consent to a procedure they do not know they are having.

Paterson’s patients consented to a mastectomy and received a modified procedure he had invented without regulatory approval and in breach of national guidelines. They were not told the modification existed. They were not told it increased their risk of recurrence. They could not therefore have given informed consent to what was actually done to them, regardless of whether they signed a consent form describing something else.

The gap between what patients are told they are consenting to and what is actually performed has become a central concern in medical law in the years since the Paterson case. A Supreme Court decision in a separate case, Montgomery v Lanarkshire Health Board in 2015, had already shifted the legal standard for informed consent in the United Kingdom toward a patient-centred test: what would this patient have considered material, rather than what would a reasonable doctor consider it necessary to disclose. Paterson’s conduct, measured against that standard, failed comprehensively.

TL;DR: Key Facts and Why This Case Matters

Who was Ian Paterson?

Ian Paterson was a British consultant breast surgeon who worked in NHS and private practice in the West Midlands from 1993 to 2011. He was convicted in 2017 of twenty counts of wounding with intent relating to unnecessary and unapproved surgical procedures on ten patients. He is serving a twenty-year prison sentence. Independent review of his wider patient population identified over 1,000 people who received unnecessary or non-compliant procedures.

What was the cleavage-sparing mastectomy?

Paterson’s cleavage-sparing mastectomy was a modification of standard mastectomy surgery that deliberately left breast tissue around the cleavage area for cosmetic reasons. It was not an approved or guideline-compliant technique. National guidelines for mastectomy require that no breast tissue be left behind, because residual tissue can harbour cancer. Patients were not told the modification existed or that it carried an increased risk of cancer recurrence. Several patients whose cancer returned after this procedure subsequently died.

What were the systemic failures that allowed this to continue?

Concerns about Paterson were first raised in 2003. He was instructed to stop performing the cleavage-sparing mastectomy in 2007 but was not suspended, reported to the regulator, or removed from practice. He continued operating in both NHS and private settings for four more years. The separation of NHS and private practice governance, and the relative absence of structured peer review in the private sector, allowed him to continue harming patients after warning signs had been identified.

Why does this case matter?

Paterson’s case is the most extensively documented case of surgical misconduct in British medical history by victim count. It illustrates how a surgeon operating in dual settings can exploit gaps in oversight between NHS and private governance, how the failure to act on early concerns extends harm to many patients, and how the doctrine of informed consent requires that patients actually know what procedure they are receiving. It also illustrates the legal distinction between civil compensation and criminal prosecution in cases of mass institutional harm.