Representing Victims of Medical Malpractice Across Ontario

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Plain-language insight on medical malpractice law in Ontario. Practical guidance, case analysis, and updates from a trial-focused practice. No legal jargon. No marketing fluff. Just what you need to know.

Articles on this site are for general information only and do not constitute legal advice. Reading articles does not create a lawyer-client relationship.

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Composite card pairing the National Post "NP" mark on a yellow panel with the title "Waivers Exist. But Medicine? Paul Cahill on the Hart suspension in the National Post" on Paul Cahill's navy brand panel.

Asking Patients to Waive the Right to Sue: Commentary in the National Post

National Post coverage of Dr. Michael Hart, the London, Ontario physician suspended for six months over his ketamine prescribing and for asking patients to sign away their right to sue him or complain to the College. Paul Cahill comments on why that document is an alarm bell, how it differs from an ordinary surgical consent form, and where a College proceeding ends and a civil claim begins.

Navy title card reading "Micallef v Distasio: Laser burns, ordinary negligence, and no expert report" from paulcahill.ca. Case comment on Micallef v Distasio, 2026 CanLII 87468 (ON SCSM), a ,000 Small Claims Court award for laser hair removal burns proven without expert standard-of-care evidence. By Paul Cahill, LSO Certified Specialist in Civil Litigation.

Micallef v Distasio: Laser Burns, Ordinary Negligence, and a $50,000 Small Claims Judgment

A self-represented plaintiff recovered the full $50,000 Small Claims Court limit for burns and permanent pigmentation loss from a laser hair removal treatment, without an expert report on the standard of care. The Court reached that result by applying Ayana v Skin Klinic, the 2009 decision establishing that laser hair removal is not a medical procedure in Ontario. The defence bet that no plaintiff expert meant no case, and lost.

Navy title card reading "Ramzanali v Sunnybrook: misnomer refused, the limitation defence left for trial" from paulcahill.ca, a case comment on 2026 ONSC 4198.

Ramzanali v Sunnybrook: Eighty Doe Defendants and the Limits of Misnomer

A patient treated at Sunnybrook over three years, a claim issued on the last day of the Trustee Act limitation period, and eighty Doe defendants. Justice Merritt refused to treat the case as misnomer, holding that the litigation finger pointed at everyone and therefore at no one. The three physicians were added anyway, with the limitation defence preserved for trial.

Navy title card reading "Hospital Patient Relations Meetings in Ontario: What to expect and how to prepare" from paulcahill.ca.

Hospital Patient Relations Meetings in Ontario: What to Expect and How to Prepare

An Ontario hospital patient relations meeting is a complaint resolution process, not an investigation. Here is what the hospital is legally required to tell you after a serious event, what it can keep to itself, and how to prepare so the meeting is worth your time. Most importantly: the hospital’s process does not pause the limitation clock.

Case header: Bradley v Wang with subtitle 'Direct observation outweighs a physician's evidence of usual practice' on a dark blue banner with 'Case Comment' and professional labels at top corners.

Bradley v Wang: A Misplaced Injection, Usual Practice Evidence, and the Mitigation Burden

The Court of Appeal for Ontario dismisses Dr. Wang’s appeal in Bradley v Wang, upholding findings that a tetanus vaccine was injected in the wrong part of the arm, that the misplacement caused an adhesive capsulitis, and that no mitigation defence was made out. The decision confirms that counterfactual proof can be assembled from evidence excluding the competing explanation, and that a defendant who cannot show suitable alternative work was available loses the mitigation argument regardless of the plaintiff’s own efforts.

Navy title card reading "Ibrahimova v Cavanagh: The Court of Appeal upholds a causation finding built on inference" from paulcahill.ca

Ibrahimova v Cavanagh: The Court of Appeal Upholds a Causation Finding Built on Inference

The Court of Appeal for Ontario dismisses Dr. Cavanagh’s causation appeal in Ibrahimova v Cavanagh, upholding findings about what would have happened at a tertiary hospital the patient never reached on the relevant day. The decision confirms that a plaintiff can prove a counterfactual treatment path through a specialist from the receiving discipline, without institutional witnesses, and that a defendant who calls no expert in that specialty is unlikely to recast the resulting findings as speculation.