Ovarian cancer misdiagnosis claims

At Osbornes Law, our medical negligence team has spent decades pursuing ovarian cancer misdiagnosis claims for clients across the UK. Recognised by Legal 500 2026 and Chambers UK 2026 for our work in delayed cancer diagnosis cases. We act on a no win no fee basis.

Why ovarian cancer gets missed in UK primary care

In our experience, most ovarian cancer claims start with a woman presenting to her GP with persistent bloating, abdominal or pelvic pain, urinary urgency or feeling full quickly. The symptoms are easily attributed to irritable bowel syndrome, perimenopause, urinary tract infection, or stress. The cancer goes undiagnosed for months while the symptoms progress.

NICE guideline NG12 and NICE CG122 set out exactly what a GP should do. Any woman aged 50 or over with the symptoms above on a persistent or frequent basis (particularly more than twelve times a month) should be offered a CA-125 blood test. If the CA-125 result is 35 IU/ml or above, the GP should arrange an ultrasound of the abdomen and pelvis. An ovarian mass, ascites or significantly raised CA-125 should trigger urgent referral on the two-week-wait suspected cancer pathway.

NICE CG122 also recognises that ovarian cancer can present in women under 50 and that IBS-like symptoms in women aged 50 or over warrant CA-125 testing, not symptomatic reassurance. Where the CA-125 is not offered, where an abnormal result is not acted on, or where ultrasound findings are misreported, the diagnosis can be delayed by months.

When a missed ovarian cancer diagnosis amounts to medical negligence

A claim does not arise just because the diagnosis came late. We have to show two things. First, that the care fell below the standard of a reasonably competent GP or gynaecologist. Second, that the delay made a real difference to your treatment options or your prognosis.

NICE NG12 and CG122 are the benchmarks we use. If your GP ignored persistent bloating and pelvic pain in a woman over 50, failed to offer a CA-125 test, dismissed a raised CA-125 without imaging, or missed an abnormal ultrasound finding, that is a strong starting point for a breach of duty argument.

Causation in ovarian cancer claims often turns on FIGO stage at diagnosis. Stage 1 disease, confined to the ovary, has a five-year survival above 90% with surgery and adjuvant chemotherapy. The same disease caught later at stage 3 or 4 carries a five-year survival of around 30% and requires more extensive surgical debulking and aggressive chemotherapy. We instruct independent gynaecological oncologists to compare what your treatment and outcome would have been at the missed appointment with where you are now.

The impact of a delayed ovarian cancer diagnosis

Early-stage ovarian cancer is treatable, with a real prospect of long-term survival. Surgery removes the affected ovary and tube, sometimes with the uterus and the other ovary, and adjuvant chemotherapy follows where indicated.

The picture changes as the disease progresses. Stage 3 disease usually requires extensive cytoreductive surgery, including bowel resection, splenectomy or peritoneal stripping, followed by platinum-based chemotherapy. Stage 4 disease means metastatic spread, and treatment shifts toward control rather than cure. Most women diagnosed late will face recurrence and ongoing treatment.

For some women, the delay is fatal. We act for families in fatal medical negligence claims where the cancer was treatable at the missed appointment but advanced by the time of diagnosis.

What you can claim compensation for

Compensation is calculated under two heads. General damages cover the pain, suffering and loss of amenity caused by the negligence. The Judicial College Guidelines set out the brackets for cancer cases. Special damages cover the financial losses.

In practice, that includes:

• Loss of earnings if the late diagnosis has stopped you working, or shortened your working life.
• The cost of private treatment, including private chemotherapy regimens or PARP inhibitor therapy.
• Surgical menopause management, HRT where appropriate, and bone density treatment.
• Psychological treatment for the impact of the diagnosis or surgical menopause.
• Travel costs for hospital, gynaecology and oncology appointments.
• Future losses, including pension shortfall and dependency claims under the Fatal Accidents Act 1976 where the prognosis is poor.

The figure in any individual claim depends on the stage at the missed appointment, the stage at diagnosis, the impact on treatment and life expectancy, and the financial losses.

Making an ovarian cancer claim with Osbornes

We work in three stages.

1. Initial review. You tell us what happened. We listen, ask questions, and tell you honestly whether we think there is a claim worth investigating. There is no obligation at this stage.
2. Investigation. We obtain your full GP, gynaecology and hospital records. We instruct an independent gynaecologist to review the standard of care, and a gynaecological oncologist to address what difference earlier diagnosis would have made. This work is funded under a no win no fee agreement.
3. Resolution. Most ovarian cancer claims settle out of court once the medical evidence is exchanged. If yours does not, our medical negligence lawyers will issue proceedings and take the case to trial.

You have three years from the date of the negligence, or the date you became aware that negligence may have caused harm, to bring a claim. In ovarian cancer claims, the second date often applies because the link between months of dismissed symptoms and the eventual stage at diagnosis only becomes clear later.

Why families choose Osbornes for ovarian cancer claims

Our medical negligence team is led by partner Hugh Johnson, with cancer misdiagnosis work led by partner Jodi Newton. Several of our solicitors hold medical qualifications, which means we read GP notes, gynaecology assessments and oncology records the way an expert witness would.

Legal 500 2026 describes the firm as a “leading firm… with particular expertise in birth injury, delayed cancer diagnosis, spinal injury, and fatal claims.” Chambers UK 2026 ranks us among the established firms handling “complex and high-value clinical negligence matters.”

“They know the law inside out and proactively work with counsel to drive cases forward. They are a go-to for complex claims.”

Chambers UK 2026

We are members of the Action against Medical Accidents (AvMA) clinical negligence panel and hold the Law Society Clinical Negligence Accreditation.

Speak to an ovarian cancer claims solicitor today

If you believe your ovarian cancer was missed, misdiagnosed or diagnosed too late, our cancer misdiagnosis lawyers will review your case in confidence and without obligation.

Call 020 7485 8811 or fill in the contact form below.