Common Cancer Misdiagnosis Claims
How Cancer Misdiagnosis Claims Are Proved
- 1Breach of duty evidence — an independent GP expert (for failure to refer) or specialist expert (radiologist, pathologist, oncologist) in the relevant specialty reviews the records and assesses whether the clinician met the Bolam standard. Departure from NICE NG12 2-week wait guidance without clinical justification is strong evidence of breach.
- 2Staging at the time of missed diagnosis — an oncologist expert assesses what stage the cancer was at the point it should have been referred or diagnosed. This requires review of the clinical records, and sometimes reconstruction from imaging and pathology reports. The stage at the "correct" diagnosis point determines the prognosis the claimant should have had.
- 3Causation — what difference did the delay make? — the oncologist then compares the prognosis at the "correct" stage with the actual prognosis at the stage of delayed diagnosis. If the delay moved the claimant from Stage 2 (e.g., 70% 5-year survival) to Stage 4 (15% 5-year survival), the causation of harm from the delay is clearly established.
- 4Quantum — the consequences of the delay — compensation covers the additional treatment required due to the advanced stage (chemotherapy, radiotherapy, surgery not required at Stage 2), lost earnings, care costs, PSLA for the extended treatment and worse prognosis, and — in the most serious cases — fatal accident claims for dependency where the delay contributed to the patient's death.
Frequently Asked Questions
What if my cancer is now in remission — can I still claim?
Yes. A cancer misdiagnosis claim is not only available where the prognosis is terminal. Where a delay caused a patient to undergo more aggressive treatment than would have been necessary with earlier diagnosis (for example, chemotherapy and radiotherapy that would not have been required at Stage 1), the additional treatment itself — with its side effects and long-term consequences — is compensable harm. The stress and uncertainty of being told the cancer was at a more advanced stage than necessary is also a head of loss assessed under PSLA.
Can I claim if the cancer was missed on a scan reported by a radiologist?
Yes — radiology errors are a well-established category of hospital negligence. A reporting radiologist is subject to the same Bolam standard as any clinician. An independent radiologist expert reviews the original imaging to assess whether the lesion was visible and identifiable on the scan at the time of reporting, whether the report fell below the standard expected of a competent radiologist, and whether earlier identification would have led to earlier treatment and a better outcome.
I told my GP about my symptoms repeatedly and was not referred — what evidence do I need?
Your GP records are the primary evidence — including the clinical notes for each consultation, the symptoms recorded (and any symptoms recorded as absent), examination findings, and the Read codes used in the clinical system. Where the GP's records do not accurately reflect the symptoms you reported, your own contemporaneous records — a symptom diary, printed online consultation submissions, messages to the surgery — are important supporting evidence. Witness statements from those present at consultations can also be used.
What if the diagnosis was not missed but the treatment was delayed?
Delay in treatment following a correct diagnosis can also give rise to a negligence claim — the question is whether the delay in starting treatment (surgery, chemotherapy, radiotherapy) was below the Bolam standard and caused harm by allowing the cancer to progress. NHS treatment waiting time standards (the 62-day cancer treatment target) may be relevant to whether a delay was systemic or individual. A specialist solicitor and oncologist expert assess the standard of care and causation in treatment delay cases.
My cancer has been diagnosed as terminal — can I claim now?
Yes — and urgency is critical. A specialist solicitor instructs a medical expert and pursues the claim as expeditiously as possible. An application for an interim payment from NHS Resolution can be made at an early stage to fund immediate needs — private treatment, care, adaptations, and family support. In terminal illness cases, a solicitor can apply to the court for expedition of the proceedings, and settlement within the patient's lifetime is the objective. After the patient's death, fatal accident and estate claims continue on behalf of the family.