Learn how to prove causation in a Turkish malpractice lawsuit, including expert reports, medical records, informed consent, complication defenses, public vs private hospital liability, damages, and limitation periods.
Proving causation is often the hardest part of a Turkish medical malpractice case. In many files, the patient can show that something went wrong, that the outcome was serious, or that the treatment process felt unsafe. But Turkish courts do not award compensation only because a patient suffered. The claimant must connect the injury to a legally relevant medical fault. In other words, the court must be persuaded that the damage was not merely the result of the underlying disease, an unavoidable risk, or a later unrelated event, but that it flowed from a breach attributable to the doctor, staff, hospital, or administration. Turkish law reaches that question through a combination of the Constitution, the Patient Rights Regulation, the Turkish Code of Obligations, the Code of Civil Procedure’s expert-witness rules, and, in public-hospital cases, the Administrative Procedure Law. (Anayasa Mahkemesi)
At the constitutional level, Article 17 protects bodily integrity and the right to protect and improve one’s corporeal and spiritual existence. That matters because a malpractice lawsuit in Turkey is not merely about disappointment with medical care. It is about whether a medical intervention that affected the patient’s body was carried out lawfully and whether any harmful consequence can be traced to a legally blameworthy medical act or omission. The Patient Rights Regulation builds on this by giving patients rights to information, consent, access to records, and legal remedies, all of which become essential when the claimant tries to prove not only fault, but also the chain linking fault to injury. (Anayasa Mahkemesi)
What causation means in Turkish malpractice litigation
Under the Turkish Code of Obligations, the person who unlawfully and culpably causes damage to another must compensate that damage, and the injured person bears the burden of proving both the damage and the tortfeasor’s fault. The Code also allows the judge to estimate the amount of damage equitably when the exact amount cannot be fully proven. Although the Code’s text here speaks expressly in terms of damage and fault, Turkish liability practice does not stop there; compensation still requires a connection between the breach and the loss claimed. In public-law liability, the Constitutional Court has stated plainly that, for the administration to be held responsible, the harmful act or action must be attributable to the administration and there must be a direct causal relation between the damaging result and the administrative act or action; if that causal relation cannot be established, compensation responsibility cannot arise.
That is why causation in a Turkish malpractice suit is usually best understood in two layers. The first is medical causation: did the challenged medical conduct probably contribute to the injury or worsening? The second is legal causation: is that medical contribution strong enough, direct enough, and attributable enough to justify compensation under Turkish law? Courts usually answer the first question through medical records and expert reports, and the second through judicial evaluation of those materials together with the legal framework on fault, consent, complication, and damages. Article 282 of the Code of Civil Procedure makes this structure explicit by stating that the judge evaluates the expert opinion freely together with the other evidence. (Rayp Adalet)
Start by identifying the exact medical fault
A claimant cannot prove causation in the abstract. Turkish courts usually need a specific breach theory before they can ask whether that breach caused anything. The Ministry of Health’s 2026 guide defines malpractice as harm arising from deviation from standard medical practice or from failure to show the care required by medical science and professional experience. The same guide also groups fault into application-related, information-related, and organizational dimensions. This is highly relevant to causation because the proof changes depending on the theory. A delayed diagnosis case needs a different causal chain from a wrong-medication case, an operating-room error, a hospital-infection case, or a defective informed-consent case.
In practical terms, the claimant should first answer a narrow question: What exactly was the wrongful act or omission? Was it failure to order a test, delay in referral, wrong treatment selection, poor monitoring, inadequate staffing, lack of sterilization, or failure to warn about a serious risk? Without that starting point, causation becomes too vague. A court cannot measure whether “bad care” caused injury. It can, however, ask whether a missing fetal-weight assessment, a delayed scan, an omitted consultation, or a mismanaged complication probably changed the medical outcome. The Constitutional Court’s press release in Hamdullah Aktaş and Others shows this clearly: the problem was not stated generically, but through specific unresolved questions such as prenatal assessment, the absence of birth-weight determination, risk disclosure about normal delivery, delayed detection of disability, and missing records. (Anayasa Mahkemesi)
Use the medical timeline to build the causal chain
The next step is to build chronology. In Turkish malpractice suits, causation is usually proved through sequence: symptom, test, intervention, worsening, missed response, later diagnosis, complication, corrective treatment, permanent loss. The Patient Rights Regulation is especially important here because it gives the patient the right to inspect and obtain copies of the file and health records and to request completion, clarification, and correction of incomplete or inaccurate data. In a causation dispute, those rights are often decisive, because the court will want to know not just what happened, but when it happened. (İnsan Hakları Dairesi)
This is also where hospitals often become vulnerable. The Ministry’s 2026 guide says that incomplete medical records are the responsibility of the healthcare institution and may not be interpreted against the patient. It also emphasizes that records must show not only what was done, but effectively why and when it was done. In a causation fight, this matters enormously. If the provider cannot show when deterioration was documented, when the physician was called, when the complication was recognized, or when the patient was warned, the court may find the defense weaker not because medicine is always exact, but because the institution failed to preserve the evidence needed to explain the chain of events.
A good causation file therefore usually gathers more than the final diagnosis or discharge note. It should include admission papers, consultation notes, nursing charts, medication records, lab results, imaging, consent forms, operative notes where relevant, discharge papers, and all later treatment records showing what happened after the original event. If the plaintiff received corrective care elsewhere, that later documentation can help show whether the original Turkish treatment probably worsened the condition, delayed recovery, or caused a permanent loss that otherwise might have been avoided. That approach is fully consistent with Turkish patient-rights law and with the expert-driven structure of malpractice adjudication. (İnsan Hakları Dairesi)
Expert reports are usually the core causation evidence
In Turkish malpractice litigation, causation is usually won or lost through expert evidence. Article 266 of the Code of Civil Procedure states that the court may seek expert opinion when resolution requires special or technical knowledge outside law, and it bars the use of experts for matters that can be resolved through ordinary legal knowledge. The Expert Witness Act defines the expert’s role similarly and requires independence, impartiality, and objectivity. In malpractice cases, this means the causal question is usually translated into medical questions for the expert panel: What standard of care applied? Was there a breach? Could the injury have occurred anyway? Did the breach probably worsen the patient’s prognosis or produce the harm alleged? (Rayp Adalet)
The Ministry’s 2026 guide confirms that courts frequently need expert examination in technical medical disputes and notes that the Forensic Medicine Institute and university departments commonly stand out in malpractice assessment. It also says higher courts expect reports to be prepared by experts, to be impartial, scientifically grounded, reviewable, and reasoned. That is exactly why a useful causation report must do more than say “there is no malpractice” or “the treatment was correct.” It should explain the medical mechanism linking or failing to link the breach to the outcome. Without that explanation, the report may be too thin to carry the judgment.
The Hamdullah Aktaş press release illustrates this point powerfully. The Constitutional Court criticized the lower courts because the expert report did not explain whether normal delivery would have been considered risky if the approximate birth weight had been known, did not address whether the parents had been informed of the relevant risks, and did not explain the effect of the delayed detection of the infant’s disability on the treatment process. In other words, the problem was not simply that the report reached the wrong conclusion. It was that the report failed to answer the very questions needed to prove or disprove causation. (Anayasa Mahkemesi)
How to ask the right expert questions
The quality of the expert report usually depends on the quality of the questions posed to the expert. In a Turkish malpractice suit, the causation issue becomes much clearer when the court is asked narrowly framed questions such as these: If the omitted test had been done on time, would the condition probably have been detected earlier? If the patient had been referred earlier, would treatment options have been broader or safer? If the risk had been disclosed properly, would the patient have had a realistic chance to choose another route? If the complication had been recognized and managed earlier, would the damage likely have been reduced? Those are causation questions, not just fault questions, and they are often what separate a persuasive report from an empty one. (Rayp Adalet)
This is also why claimants should use Article 281 of the Code of Civil Procedure actively. That provision gives parties two weeks from service of the report to request completion of omissions, clarification of ambiguities, or appointment of a new expert. The court may also obtain a supplementary report or order a renewed examination by another expert if necessary for the emergence of truth. In malpractice cases, this objection stage is often where causation becomes sharper. A party that accepts a vague first report without challenge may lose the case on a preventable evidentiary weakness. (Rayp Adalet)
Overcoming the “complication” defense
One of the most common defenses against causation in Turkish malpractice cases is the argument that the bad outcome was a complication, not a preventable error. The Ministry’s 2026 guide defines complication as an unwanted result that may occur even if the provider is not at fault and accepted medical standards were followed. But the same guide is equally clear that complication does not automatically end responsibility. If standards were not followed, if the patient was not informed of the risk, or if the complication was poorly managed afterward, liability may still arise. The guide even cites Council of State logic that hospital infection is not by itself fault, but lack of due hygiene may still be treated as service fault.
For causation, this means the claimant should not focus only on the initial complication event. The stronger question is often whether the provider’s response to that event changed the outcome. Did the team monitor appropriately? Was the complication recognized in time? Were preventive or damage-limiting measures taken promptly? Was the patient warned beforehand so that the risk was truly accepted? Turkish law allows the claimant to win causation by showing that even if the first event was a recognized risk, the later mismanagement probably worsened the injury or removed a chance to reduce it.
Informed consent can also create a causation argument
Causation in Turkish malpractice law is not always limited to physiology. Sometimes the key causal link is decision-causation: if the patient had been properly informed, would the patient have chosen a different treatment path? The Patient Rights Regulation requires that the patient be informed about the planned intervention, its benefits and drawbacks, alternatives, and the likely consequences of refusal. The Ministry’s 2026 guide calls informed consent one of the four essential elements of a lawful medical intervention and states that lack of adequate information may itself count as a rights violation. (İnsan Hakları Dairesi)
Again, Hamdullah Aktaş is instructive. The Constitutional Court explicitly stated that patients may change their consent to a delivery method when they are adequately informed of potential risks and that consent can be regarded as valid only when the patient has been informed accordingly. That reasoning matters beyond obstetrics. In a malpractice suit generally, if the plaintiff can show that proper disclosure would probably have led to another treatment choice, another hospital, another timing decision, or refusal of the challenged intervention, that can supply an important part of causation. (Anayasa Mahkemesi)
Public hospitals and private hospitals require different causation routes
In private-sector malpractice cases, causation is usually proved within an ordinary judicial action against the physician and/or healthcare institution. The Ministry’s 2026 guide describes private-provider cases as contract and/or tort disputes in the ordinary courts. In those files, the claimant typically uses the Turkish Code of Obligations, patient-rights rules, and expert reports to show that the private provider’s breach caused the injury and the resulting losses.
In public-hospital cases, the route is different. The same Ministry guide describes public-institution cases as administrative activity, with service fault, the administration as defendant, and administrative courts as forum. The Constitutional Court has also stated, in general administrative-liability terms, that the administration’s compensation responsibility requires a direct causal relation between the damaging result and the administrative act or action. So when proving causation in a public-hospital malpractice case, the claimant is not just linking doctor conduct to injury; the claimant is linking injury to a public health service that functioned defectively. That can widen the causation analysis to include staffing, hygiene, referral systems, records, or institutional delay.
This public route also carries strict timing rules. Article 13 of the Administrative Procedure Law requires a prior written application to the administration within one year of learning of the harmful act and, in all events, within five years of the act itself; suit follows after rejection or deemed rejection, and Article 7 sets the ordinary administrative filing period at sixty days unless a special rule applies. A claimant who proves causation medically but misses this route procedurally may still lose. (www.gap.gov.tr)
Causation must continue into the damages stage
Even after fault and injury are linked, Turkish law still requires the claimant to connect the malpractice to the specific losses claimed. The Turkish Code of Obligations lists bodily-injury losses such as treatment expenses, loss of earnings, reduced or lost working capacity, and impairment of economic future, and it recognizes moral damages for bodily injury. It also states that these bodily-injury and death-damages rules apply to administrative acts and actions causing bodily injury or death. This means the claimant must show not only that malpractice caused some harm, but that the claimed surgery costs, rehabilitation, lost income, permanent disability, or future economic impairment actually flowed from that harm.
This is why causation in Turkish malpractice cases often has a second evidentiary phase. A plaintiff may prove that delayed treatment worsened the condition, but still need payroll records, disability assessments, invoices, and follow-up medical opinions to show that the later financial and functional losses were consequences of that worsening. The Code’s limitation rule for tort claims—two years from learning of the damage and liable person, with a ten-year outer limit, subject to longer criminal limitation where applicable—also makes early evidence collection important. The general ten-year limitation in Article 146 may matter in contract-based analysis as well.
A practical causation roadmap
In practical Turkish litigation, proving causation usually works best in the following sequence. First, identify the precise medical fault. Second, reconstruct the full timeline from records. Third, formulate targeted expert questions that ask not only whether there was fault, but whether earlier or different conduct would probably have changed the outcome. Fourth, challenge any report that ignores chronology, disclosure, or the worsening mechanism. Fifth, connect the medical worsening to each damages item claimed. This roadmap is not stated in one statute as a checklist, but it is the combined logic of the Code of Obligations, the Patient Rights Regulation, the Code of Civil Procedure, the Expert Witness Act, the Ministry’s 2026 guide, and Constitutional Court scrutiny of inadequate reasoning in medical-negligence files.
Conclusion
To prove causation in a Turkish malpractice lawsuit, the claimant must do more than show a bad result. Turkish courts usually require a convincing chain: a concrete medical breach, a reliable chronology, a persuasive expert explanation of how that breach affected the medical outcome, and a second link from that outcome to the damages claimed. Complication defenses, missing records, weak consent processes, and institutional failures all shape that analysis. In public hospitals, the same inquiry is filtered through service fault and administrative procedure; in private hospitals, it typically proceeds in ordinary courts under contract and tort logic. But in both settings, the core question remains the same: did this medically and legally identifiable fault actually cause this harm? Under Turkish law, that question is answered through records, expert science, and disciplined procedural strategy—not through assumption alone. (Kararlar Bilgi Bankası)
Yanıt yok