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C. [A Minor] v Health Service Executive (Approved)
Factual and Procedural Background
This is a personal injuries action alleging medical negligence brought by the Plaintiff (a minor born January 2020, suing by her father and next friend) against the Defendant (a health service body). The Defendant applied for a stay of proceedings until the Plaintiff and her parents (a) attend for a clinical examination by the Defendant's genetics expert and (b) provide buccal swab samples to permit trio exome sequencing. Reporting restrictions were ordered to protect the child's identity. The pleaded facts (recounted without findings) describe repeated hospital attendances in February 2020 for vomiting, reduced feeding, somnolence and abnormal eye movements, eventual measurement of increased head circumference and bulging fontanelle, CT and MRI demonstrating hydrocephalus and haemorrhagic intracranial pathology, transfer to a tertiary paediatric centre and neurosurgical intervention. The Defendant admits failures to measure occipito‑frontal head circumference on several visits but does not admit that any admitted breach caused the Plaintiff's injuries. The motion judge (Judge Simons) heard expert evidence from the Defendant's retained genetics expert, Expert Doyle, and no medical expert evidence was adduced on behalf of the Plaintiff in response to the motion.
Legal Issues Presented
- Whether the court should stay the personal injuries proceedings until the Plaintiff and her parents undergo a clinical genetics examination and provide buccal swab samples for trio exome sequencing.
- Whether the proposed genetic testing is relevant/material to the issues in controversy and likely to have a meaningful bearing on the outcome of the proceedings.
- Whether the Plaintiff (and her parents) have substantial grounds to refuse the testing, including privacy, autonomy, data security and familial interests, and if so how those rights should be balanced against the Defendant's right to defend.
- What safeguards and procedures are necessary to ensure proportionality and confidentiality if testing is ordered.
Arguments of the Parties
Plaintiff's Arguments
- The proposed genetic testing is not relevant because the Defendant has admitted failures in measurement for which it accepts potential earlier diagnosis; the Plaintiff advances an "indivisible injury" argument that, if contribution is established, she could recover for the entirety of her impairments without a need for genetic causation evidence.
- Prior genetic investigations were extensive and negative; no concrete pathogenic hypothesis has been identified to justify further testing.
- Privacy and autonomy concerns for the parents and child, including impacts on biological relatives and the qualitative burden of incidental findings.
- Data security, laboratory quality and "function‑creep" concerns about use, retention and reuse of DNA and sequencing data.
- Delay by the Defendant in bringing the motion.
- It would be improper to require parental specimens where the parents are characterised as third parties.
Defendant's Arguments
- The proposed clinical genetics assessment and phenotype‑driven trio exome sequencing are likely to identify a genetic diagnosis that would have meaningful bearing on causation and the outcome of the action.
- Expert Doyle's reports explain that prior testing was limited and that trio exome sequencing using parental comparators is the gold standard in such presentations.
- The testing procedure is non‑invasive (buccal swab), will be preceded by pre‑test counselling and informed consent, and incorporates safeguards addressing incidental findings, confidentiality, laboratory quality and data retention.
- The parents are not third parties for these purposes as they are actively litigating the claim and the father acts as next friend.
Table of Precedents Cited
| Precedent | Rule or Principle Cited For | Application by the Court |
|---|---|---|
| McGrory v. Electricity Supply Board [2003] 3 IR 407 | Inherent jurisdiction of the court to stay proceedings where a plaintiff refuses to submit to a medical examination; plaintiff suing for personal injuries implicitly waives some privacy rights. | Established the overarching principle that a plaintiff must not unfairly and unreasonably impede the defendant's preparation of its defence; used as the domestic starting point for the stay application and to justify a balancing exercise. |
| Clarke v. Poole [2024] EWHC 1509 (KB); [2025] EWCA Civ 447 | English articulation of a three‑stage test for ordering stays for genetic testing (relevance; substantial reason to refuse; balancing/proportionality). | Cited by parties and considered; the court declined to adopt a separate three‑stage formulation and instead applied a two‑limb approach grounded in domestic law (relevance threshold then balancing/proportionality). |
| Ryan v. Dengrove DAC [2022] IECA 155 | Principles for disclosure of confidential documents: relevance/materiality balanced against confidentiality; confidential material not ordered disclosed absent real basis of likely relevance. | Applied by analogy to medical examinations: first assess materiality/relevance of the examination; once met, proceed to proportionality balancing. |
| CNZ (by her father and litigation friend MNZ) v. Royal Bath Hospitals NHS Foundation Trust [2023] EWHC 19, 192 BMLR 94 | Application of "indivisible injury" concept where negligent delay materially contributed to progressive injury leading to an inability to quantify contribution; claimant recovered 100% where causal mechanism and contribution were established on evidence. | Distinguished: court noted CNZ had clear expert evidence of a continuous pathological mechanism and accepted contribution; no analogous expert evidence existed in the present motion, so CNZ did not support refusal of testing. |
| Bailey (by her father and litigation friend) v. Ministry of Defence [2008] EWCA Civ 883, [2009] 1 WLR 1052, 103 BMLR 134 | Material contribution / modification of "but for" test where medical science cannot establish probability but can show contribution more than negligible. | Noted as authority where contribution was established on evidence; court observed such cases do not permit inference of contribution absent evidence. |
| Williams v. Bermuda Hospitals Board [2016] UKPC 4, [2016] AC 888, 150 BMLR 1 | Confirmation that material contribution test applies where negligent cause forms part of cumulative process leading to indivisible injury. | Used to illustrate that prior authorities rest on evidential findings of contribution; did not permit inferring causation without evidence in the present case. |
| ACC Bank plc v. Hanrahan [2014] IESC 40, [2014] 1 IR 1 | Circumstances in which it may be inappropriate to adjudicate costs on an interlocutory application. | Referred to when considering whether to determine costs of the interlocutory motion; court concluded, given issues were self-contained, it was appropriate to deal with costs provisionally. |
| Order 99, rule 3 of the Rules of the Superior Courts; Section 169 of the Legal Services Regulation Act 2015; Section 45 of the Courts (Supplemental Provisions) Act 1961 | Procedural law governing costs and the statutory basis for reporting restrictions. | Section 45 was used to justify reporting restrictions; Order 99, rule 3 and Section 169 guided the court's provisional approach to awarding costs of the motion. |
Court's Reasoning and Analysis
Judge Simons proceeded from the domestic principle in McGrory that courts may stay proceedings to prevent a plaintiff unfairly and unreasonably impeding a defendant's defence. He considered submissions advocating a three‑stage test (relevance; substantial reason to refuse; balancing/proportionality), but concluded that the appropriate approach is a two‑limb analysis by analogy with confidentiality/disclosure jurisprudence: (1) threshold of relevance/materiality—whether the proposed examination is likely to elicit information relevant to the defence; and (2) a balancing/proportionality assessment weighing the likely relevance against interference with the plaintiff's rights (privacy, confidentiality, bodily integrity).
The only medical evidence before the court consisted of three reports from the Defendant's genetics expert, Expert Doyle, who opined that, given the Plaintiff's developmental delay, dysmorphic features, early‑onset obesity and ventriculomegaly, a genetic diagnosis is likely and that phenotype‑driven trio exome sequencing (including parental comparators) is the gold standard likely to have meaningful bearing on causation. Expert Doyle described non‑invasive buccal swab sampling, pre‑ and post‑test counselling, limits on reporting incidental findings, laboratory accreditations and data‑retention safeguards.
The court examined the Plaintiff's arguments: the "indivisible injury" submission was rejected on the basis that there was no expert evidence before the court to show a biological mechanism or that the admitted breaches had contributed to the present impairments; prior authorities (e.g. CNZ, Bailey, Williams) that support indivisible‑injury recoveries were distinguishable because they rested on evidential findings of contribution. The court also rejected submissions that prior genetic testing was exhaustive, accepting Expert Doyle's description that previous investigations were limited and had not included phenotype‑driven trio exome sequencing with parental comparators.
On balancing, the court found the proposed process and safeguards addressed privacy, autonomy, incidental findings and data security concerns, and that the Defendant's need to defend would be impeded without the testing. The court therefore concluded the relevance threshold was met and that proportionality weighed in favour of staying the proceedings pending the clinical assessment and trio exome sequencing. The court also addressed delay and parental status, finding no material prejudice from any filing delay and that the parents, actively litigating the claim, could not be treated as unrelated third parties for the purpose of providing parental samples.
Holding and Implications
Holding: An order is made staying the proceedings until such time as the Plaintiff and her parents (a) attend for a clinical examination by the Defendant's genetics expert and (b) provide buccal swab samples to allow trio exome sequencing to be conducted thereon.
Implications:
- The court found the proposed testing likely to have a meaningful bearing on the outcome; if a genetic cause is established and no evidence shows February 2020 events contributed to the current presentation, the Plaintiff's case may be dismissed at trial; the Plaintiff remains free to adduce expert evidence at trial on causation.
- The court provisionally determined that the Defendant is entitled to recover the costs of the motion, but stayed execution of the costs order until the substantive proceedings have been determined; parties may apply to vary the costs order within fourteen days.
- No wider novel legal principle was created; the decision applies the established domestic test of relevance plus proportionality in ordering stays for medical/genetic examination in personal injury litigation.
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