Delayed or missed diagnosis of endometriosis

For many women, endometriosis is not diagnosed for years.

Instead, symptoms are often dismissed as:

• Normal period pain
• Stress
• IBS
• Urinary problems
• Simply something patients are expected to tolerate

By the time a diagnosis is finally made, many patients have already endured years of severe pelvic pain, repeated GP appointments, fertility difficulties, missed work, and a significant impact on their mental health and relationships.

In some cases, those delays may amount to clinical negligence.

While endometriosis can be difficult to identify, healthcare professionals are still expected to recognise red-flag symptoms, carry out appropriate investigations, and refer patients for specialist assessment within a reasonable timeframe.

Where warning signs were repeatedly overlooked, ignored, or inadequately investigated, patients may be entitled to bring a delayed diagnosis compensation claim.

What is endometriosis?

Endometriosis is a chronic condition where tissue similar to the lining of the womb grows elsewhere in the body.

It commonly affects:

• The ovaries
• Fallopian tubes
• Pelvis
• Bowel
• Bladder
• The condition can cause inflammation, internal scarring, adhesions, and significant long-term pain

Symptoms can vary considerably between patients, but commonly include:

• Severe period pain
• Chronic pelvic pain
• Pain during or after sex
• Pain when passing urine
• Heavy or irregular bleeding
• Bloating and fatigue
• Fertility difficulties
• Lower back pain
• Mental health difficulties linked to ongoing symptoms
• For some women, symptoms become so severe that they affect education, careers, daily activities, and family life

How long does it take to diagnose endometriosis?

One of the most concerning features of endometriosis care in the UK is the length of time many patients wait for diagnosis.

According to Endometriosis UK, the average diagnosis time is now almost 9 years.

In some cases, the delay may reflect the complexity of the condition. In others, it may reflect avoidable failings in care.

Why is endometriosis so often missed?

Endometriosis symptoms frequently overlap with other conditions.

Patients are commonly:

• Treated repeatedly for IBS
• Prescribed pain relief without investigation
• Reassured symptoms are “normal”
• Referred far too late
• In many negligence claims, medical records reveal years of missed opportunities

For example:

• Repeated complaints of severe pelvic pain
• Worsening symptoms over time
• Multiple A&E attendances
• Fertility concerns
• Bowel and bladder symptoms, without proper referral to gynaecology
• A normal ultrasound does not necessarily rule out endometriosis
• NICE guidance makes clear that clinicians should still consider referral where symptoms strongly suggest the condition

When can delayed diagnosis become medical negligence?

A delayed diagnosis does not automatically mean negligent care.

However, there may be grounds for a clinical negligence claim where healthcare professionals failed to act reasonably in response to a patient's symptoms.

Examples may include failures to:

• Take symptoms seriously
• Investigate persistent pelvic pain
• Arrange appropriate scans
• Refer to gynaecology
• Review repeated attendances
• Recognise fertility-related concerns
• Escalate suspected deep infiltrating endometriosis

The key legal question is usually would a reasonably competent clinician have referred, investigated, or diagnosed the condition earlier? If the answer is yes, and the delay directly caused avoidable harm, a claim may be possible.

Common examples of endometriosis negligence claims

Claims commonly involve:

• GPs
• NHS hospitals
• Private gynaecologists
• Fertility clinics

Typical scenarios include symptoms repeatedly dismissed as normal periods, misdiagnosis of IBS, delayed fertility investigation, failure to investigate bowel or bladder symptoms, and failure to refer to specialist services.

The impact of delayed diagnosis

The consequences can be devastating.

Many women experience:

• Years of avoidable pain
• Psychological distress
• Repeated hospital attendances
• Relationship difficulties
• Career disruption
• Loss of earnings
• Significant fertility anxiety

In more serious cases, delays may allow:

• Disease progression
• Worsening adhesions
• Bowel involvement
• Bladder damage
• The need for more extensive surgery
• Earlier diagnosis may not cure endometriosis, but it can significantly reduce unnecessary suffering and allow patients to access appropriate treatment earlier

What evidence is needed?

Endometriosis claims are often heavily dependent on medical records and chronology evidence.

Important records may include:

• GP notes
• Hospital records
• Gynaecology records
• Ultrasound and MRI reports
• Laparoscopy findings
• Fertility treatment records
• Referral letters
• Prescription records
• Employment records
• Symptom diaries

Independent medical experts are usually needed to assess:

• Whether care fell below a reasonable standard, and
• Whether earlier diagnosis would likely have mitigated the harm experienced

How are endometriosis negligence claims proved?

Most clinical negligence claims involve three key elements.

Breach of duty - Did the medical care fall below a reasonable standard of care?

Causation - Did the delay directly cause or materially contribute to avoidable harm?

Loss - What physical, psychological, and financial impact did the delay have?

Causation is often the most heavily disputed issue in endometriosis litigation.

Defendants may argue that:

• The condition would have progressed anyway
• Earlier diagnosis would not have changed treatment
• Symptoms would have remained the same
• That is why detailed independent expert evidence is critical

What compensation can include

Compensation may include damages for:

• Pain, suffering, and loss of amenity (PSLA damages)
• Psychiatric injury
• Fertility-related harm
• Additional surgery
• Private treatment costs
• Lost earnings
• Future care and assistance
• Therapy costs
• Any future treatment needs
• Every case depends on its own facts, medical evidence, and the extent of the avoidable harm caused by the delay

How long do I have to bring a claim?

In most clinical negligence claims, the usual time limit is three years from the date of the negligent treatment or from the date you first knew, or ought reasonably to have known, that your injury may have been caused by negligent care. Different rules apply for children and for adults who lack mental capacity.

Because endometriosis diagnosis often involves a long history, it is important to seek advice as soon as possible so that the relevant dates and records can be reviewed.

Speak to a specialist clinical negligence solicitor

If your endometriosis was diagnosed late, or repeatedly missed despite ongoing symptoms, you may be entitled to bring a compensation claim.

These cases often involve years of medical records, multiple referrals, and complex expert evidence.

A specialist clinical negligence solicitor can help determine:

• Whether opportunities were missed
• Whether referral or diagnosis should have occurred earlier
• Whether the delay caused avoidable harm
• If you believe you have suffered because of a delayed or missed diagnosis of endometriosis, contact Scott and his team for a confidential initial review