Delayed diagnosis claims arise when the correct diagnosis is eventually reached, but reached so late that the delay caused or worsened the patient’s injury. Common contexts include cancer, sepsis, stroke, cauda equina syndrome, ectopic pregnancy, compartment syndrome, and bowel ischemia, all of which carry significant downside risk when diagnosis is deferred.
Delayed diagnosis is distinct from failure to diagnose (where the condition was never identified at all) and from misdiagnosis (where a different and wrong diagnosis was made). In a delayed diagnosis claim, the standard of care analysis focuses on whether the relevant practitioner should have recognized the signs and ordered investigations sooner, while the causation analysis focuses on what difference earlier diagnosis would have made to outcome. The latter is often the harder element to prove, particularly in oncology cases, where the stage at the point of actual diagnosis may already commit the patient to a poor prognosis regardless of when the diagnosis was made.
Posts tagged Delayed Diagnosis analyze how Ontario courts have approached the standard of care and causation questions in delayed diagnosis claims across multiple clinical contexts.
Rule 53.08 was tightened in 2022 to stop the routine late service of expert reports. In Pelrine v Chung, the Divisional Court held that the correction can be overdone, and that the interests of justice apply throughout the rule rather than only at its second stage. Two excluded defence reports were let in, thirteen months before a jury trial.
When overcrowded Ontario emergency departments contribute to delayed diagnoses, premature discharges, or death, the legal standard of care does not bend.
Ontario mid-trial ruling adopts but-for phrasing for jury causation questions in delayed diagnosis aneurysm case but declines to require jurors to give reasons.
Manitoba Court of Appeal affirms dismissal of delayed colon cancer diagnosis claim. The Benhaim framework on adverse inferences and statistical evidence in causation.
A settlement on behalf of a woman in her 60s whose family physician dismissed three years of GI symptoms despite a known family history of colon cancer.
Cauda equina syndrome is a surgical emergency. The legal claims that follow are almost always about whether the diagnosis and treatment were timely enough.
A settlement on behalf of the family of a 39-year-old mother of two whose breast cancer was diagnosed too late after a missed opportunity to investigate.
A self-represented plaintiff’s Lyme disease delayed-diagnosis claim was dismissed at summary judgment after his sole expert witness was disqualified.
A delayed-diagnosis cancer claim was dismissed at standard of care and causation, with a 40% contributory negligence finding for repeated failures to follow up.
A delayed cancer diagnosis can be the difference between life and death. A patient’s guide to the common causes and what it takes to prove a claim in Ontario.
Ectopic pregnancy is a leading cause of first-trimester maternal death. When the diagnosis is delayed, the consequences can be catastrophic.
Sepsis is one of medicine’s most time-sensitive diagnoses. When it is missed, the consequences are catastrophic and often preventable.
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