Cancer Misdiagnosis – an overview

Cancer misdiagnosis cases are a significant subset of medical negligence claims, often involving serious consequences due to delays in diagnosis or inappropriate treatment. Here’s a structured overview of these cases:


1. What Is a Cancer Misdiagnosis?

A cancer misdiagnosis can involve:

  • False Negative: Failing to diagnose cancer that is present (delayed diagnosis).

  • False Positive: Diagnosing cancer when none is present.

  • Misclassification: Incorrectly identifying the type or stage of cancer.

  • Delayed Referral or Testing: Failing to act on red flags or abnormal results in time.


2. Commonly Misdiagnosed Cancers

Some cancers are more prone to misdiagnosis due to their nonspecific symptoms:

  • Lung cancer (often mistaken for chest infections or asthma)

  • Breast cancer (lumps missed or misinterpreted on scans)

  • Colorectal cancer (symptoms confused with IBS or hemorrhoids)

  • Prostate cancer (symptoms misattributed to benign prostatic hyperplasia)

  • Ovarian cancer (non-specific symptoms like bloating or pelvic pain)


3. Causes of Misdiagnosis

  • Inadequate examination or history taking

  • Failure to order appropriate tests (e.g., imaging, biopsy)

  • Errors in interpreting scans or pathology results

  • Lack of follow-up on abnormal results

  • Communication breakdown between primary and secondary care


4. Legal Considerations

To succeed in a claim for medical negligence, a claimant must prove:

  • Duty of care was owed by the healthcare provider.

  • Breach of duty occurred (i.e., care fell below a reasonable standard).

  • Causation: The breach caused avoidable harm — e.g., cancer progressed or the chance of survival was significantly reduced.

  • Loss: The claimant suffered harm (e.g., worsened prognosis, unnecessary treatment).

James McSweeney has acted for Cancer Misdiagnosed patients – if you would like to discuss further, please call us on 01-4521200.

James McSweeney Solicitors LLP is a limited liability partnership regulated by the Legal Services Regulatory Authority. *In contentious business a solicitor may not calculate fees or other charges as a percentage or proportion of any award or settlement.*This statement is made in compliance with Reg.8 of SI 518 of 2002

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