Quick answer
A missed or delayed cancer diagnosis is compensable only where care was negligent and the delay probably caused a worse outcome or additional loss. The crucial comparison is between what actually happened and the likely course with competent, timely care.
What this guide adds
This guide focuses on counterfactual causation: referrals, pathology and imaging timelines, tumour biology, stage, treatment options and measurable consequences of delay.
Delay is not automatically negligence
Symptoms can be non-specific and screening is not perfectly accurate. The legal analysis asks whether a reasonably competent clinician should have investigated, safety-netted, referred, interpreted or communicated differently at the relevant time.
The counterfactual question
Even if breach is proved, an independent expert must consider what would probably have happened without it. Relevant issues can include stage migration, tumour growth, treatment intensity, prognosis, avoidable pain and psychological or financial consequences.
Create a defensible chronology
- First symptoms and consultations
- Safety-netting advice and repeat attendances
- Referral dates and urgency category
- Imaging, pathology and multidisciplinary review
- Diagnosis, staging and treatment
- The effect of delay identified by an appropriate expert
Screening and symptomatic diagnosis differ
A normal screening result does not guarantee that cancer is absent, and screening programmes target particular populations and intervals. New or persistent symptoms still require appropriate clinical consideration. A claim about image or sample interpretation may need a different expert from one about referral.
Records and privacy
Health information is special-category personal data. A claimant can request relevant records, but a lawful request does not mean every record should be published or sent insecurely. Share medical material through an agreed secure process.
Authoritative sources
These primary sources support and contextualise this guide. They are not a substitute for advice on the facts of an individual case.
- NHS inform: screening — Official explanation of Scottish screening programmes and their limitations.
- NHS inform: what is cancer? — Official patient information about cancer and treatment.
- ICO: special category data — Official guidance explaining the enhanced protection for health information.
- Prescription and Limitation (Scotland) Act 1973 — The statutory framework for limitation in Scottish personal injury actions.
Next useful steps
Read the Medical negligence claims, build an evidence checklist, and check the Scottish time-limit guide.
General information only. The applicable law, forum and deadline depend on the facts. Medical symptoms should be assessed by an appropriate healthcare professional.