Mansfield v Heather

The appellant, Mansfield, brought proceedings against the first respondent, Heather, a medical practitioner, alleging negligence in failing to detect a malignant melanoma. The dispute concerned whether the appellant had been correctly diagnosed and treated for a skin lesion. The case was heard in the Court of Appeal of New South Wales.

The primary legal issues before the Court of Appeal were whether the medical practitioner had been negligent in their diagnosis and treatment of the appellant's skin lesion, and whether the original test results, which did not indicate malignancy, absolved the practitioner of liability. The court also considered issues of joinder and vicarious liability in the context of the medical practitioner's actions.

The Court of Appeal allowed the appeal, finding that the medical practitioner had been negligent. The court reasoned that the practitioner had failed to exercise reasonable care and skill in assessing the lesion, despite the initial test results. The court applied the principles of medical negligence, holding that a medical practitioner owes a duty of care to their patient and that a breach of this duty occurs when their conduct falls below the standard of a reasonably competent practitioner in the circumstances. The court determined that the initial test results did not negate the practitioner's ongoing duty to properly diagnose and manage the lesion.

Consequently, the Court of Appeal ordered that the appeal be allowed, the notice of motion be dismissed, and that the first respondent pay the appellant's costs of the proceedings in the District Court and of the appeal, with an order made under the Suitors' Fund Act.