In this medical malpractice action, plaintiff appeals as of right an order striking plaintiffs expert witness testimony and granting defendants’ motion for summary disposition under MCR 2.116(C)(10). We vacate and remand.
Flaintiffs decedent sought medical treatment for symptoms that were consistent with pneumonia. In July 1997, defendant Robert Baker, M.D., a radiologist, *599 reviewed an x-ray of the decedent’s chest and lungs. At that time, Dr. Baker reported no abnormal findings. In February 1998, however, plaintiffs decedent was diagnosed with lung cancer, which claimed her life in March 1999. Plaintiff thereafter filed a medical malpractice wrongful death action against Dr. Baker and Chippewa County War Memorial Hospital, the hospital with which Dr. Baker was affiliated. Plaintiff primarily alleged that Dr. Baker was negligent in reading and interpreting the results of the July 1997 chest x-ray and that the delay in diagnosing the decedent’s lung cancer delayed treatment and caused her death.
During discovery, plaintiff deposed his causation experts, Drs. Stephen Veach and Barry L. Singer. Both doctors are board-certified in medical oncology. According to the doctors’ deposition testimony, lung cancer is staged at Stages I through TV for the purposes of treatment and prognosis. Patients with Stage I lung cancer have a five-year survival rate of seventy percent, while patients with Stage II lung cancer have a five-year survival rate of forty percent. Dr. Veach testified that the decedent’s lung cancer would have been at either Stage I or Stage II in July 1997. However, he conceded that he could not state with a reasonable degree of certainty how much the decedent’s cancer had metastasized in July 1997. Dr. Singer testified that the decedent’s lung cancer would have been at either Stage I or Stage II in 1997, but that he “favored” staging the cancer at Stage I at that time. When asked what literature or information he relied on in forming his opinion, Dr. Singer asserted that he was relying on his “general experience” as an oncologist. Dr. Singer conceded that he could not state with a reasonable degree of probability that the decedent’s cancer was at Stage I or II in July 1997. However, he stated that he could conclude with a reasonable degree of certainty that if *600 the decedent’s cancer had been diagnosed in July 1997, her chances of survival would have been sixty percent. Dr. Singer based his opinion about the decedent’s chances of five-year survival on what he called the “weighted averages” of the five-year survival rates for individuals with Stage I or Stage II lung cancer.
Defendants filed separate motions to strike plaintiffs causation experts’ testimony, arguing that it was speculative and lacked a reliable scientific basis. Specifically, defendants contended that plaintiffs experts’ testimony was inadmissible under MRE 403, MRE 702, and MCL 600.2955. In the alternative, defendant hospital moved for the trial court to conduct a Davis-Frye 1 hearing. Defendants also moved for summary disposition under MCR 2.116(C)(10).
The trial court ruled that while plaintiffs experts were qualified, they did not have a scientific basis for asserting that the decedent’s cancer was at Stage I or Stage II in July 1997, and it was therefore impossible to determine the stage of the decedent’s cancer in July 1997. The trial court characterized as mere “speculation and conjecture” plaintiffs experts’ contention that had the decedent’s cancer been diagnosed in July 1997, the decedent would have had a greater than fifty percent chance of surviving the cancer. Without plaintiffs experts’ testimony, plaintiff was unable to establish that the decedent would have had a greater than fifty percent chance to survive. Therefore, the trial court granted defendants’ motion for summary disposition under MCR 2.116(C)(10).
*601
This Court reviews de novo a trial court’s grant or denial of summary disposition under MCR 2.116(C)(10).
Spiek v Dep’t of Transportation,
This Court reviews the trial court’s decision regarding the qualification of an expert witness for an abuse of discretion.
Bahr v Harper-Grace Hospitals,
MRE 702 governs the admissibility of expert testimony. MRE 702 provides:
If the court determines that recognized scientific, technical, or other specialized knowledge will assist the trier of fact to understand the evidence or to determine a fact in issue, a witness qualified as an expert by knowledge, skill, experience, training, or education may testify thereto in the form of an opinion or otherwise ....
The trial court has an obligation under MRE 702 “to ensure that any expert testimony admitted at trial is rehable.”
Gilbert, supra
at 780. “Careful vetting of ah aspects of expert testimony is especially important when an expert provides testimony about causation.”
Id.
at 782. In
People v Beckley,
Under MRE 702, the trial court had an independent obligation to review all expert opinion testimony in order to ensure that the opinion testimony . .. was rendered by a “qualified expert,” that the testimony would “assist the trier of fact,” and... that the opinion testimony was rooted in “recognized” scientific or technical principles. These obligations applied irrespective of the type of expert opinion testimony offered by the parties. While a party may waive any claim of error by failing to call this gatekeeping ' obligation to the court’s attention, the court must evaluate *603 expert testimony under MRE 702 once that issue is raised. [Id. at 82 (emphasis in original).]
We find that the trial court failed to properly exercise its function as a gatekeeper of expert opinion testimony in striking plaintiffs experts’ testimony without either conducting a more searching inquiry under its obligation to preclude speculative and unreliable evidence under MRE 702, see Beckley, supra at 710-719, or holding a Davis-Frye evidentiary hearing to determine whether plaintiffs experts’ testimony regarding the “backwards staging” of the decedent’s cancer had achieved general scientific acceptance for reliability. We therefore remand this case to the trial court. On remand, the trial court shall either conduct a Davis-Frye evidentiary hearing or a more thorough inquiry under MRE 702 to ensure that the testimony satisfied the three Beckley conditions for admissibility.
Davis-Frye
applies only to novel scientific principles.
People v Coy,
The proponent of expert testimony bears the burden of proving that the contested opinion is based on generally accepted methodology. Craig, supra at 83. In this case, by striking plaintiffs experts’ testimony without holding a Davis-Frye hearing or conducting a more searching inquiry under MRE 702, the trial court foreclosed plaintiffs ability to sustain this burden. In other words, the trial court prematurely struck plaintiffs experts’ testimony and deprived plaintiff of the opportunity to provide medical or scientific authority to support his experts’ claims that the decedent’s lung cancer was at Stage I or Stage II in July 1997. Plaintiff should have been afforded the opportunity to present the testimony of disinterested and impartial experts to show that his causation experts’ testimony regarding the “backwards cancer staging” of the decedent’s cancer to July 1997 was supported by medical or scientific data. See Coy, supra at 10.
Our decision to remand for the trial court to conduct a more searching inquiry under MRE 702 or a Davis-Frye hearing should not be interpreted by the trial court as a mandate to admit plaintiffs experts’ testimony. We merely hold today that the trial court should not have *605 stricken the testimony without either conducting a more searching inquiry under MRE 702 or holding a Davis-Frye hearing. On remand, the trial court may once again determine that plaintiffs causation experts’ testimony must be stricken as unreliable and speculative. Before reaching this conclusion, however, the trial court must satisfy its obligation under MRE 702 or conduct a Davis-Frye hearing and give plaintiff the opportunity to establish the reliability of the testimony. We recognize that there are unique complications with establishing the reliability of this type of testimony because conducting a medical or scientific study on this subject would require cancer patients to do the unthinkable: volunteer to participate in a study in which their cancer would be left untreated so that doctors could then track the progression and staging of their cancer. No patient would volunteer for such a study, and no ethical medical or scientific study would ask cancer patients to submit to such a study. 2 The fact that such studies are nonexistent should not necessarily operate as a complete bar to plaintiffs medical malpractice action, however, in the absence of a more searching inquiry into the reliability of the testimony supplied by plaintiffs experts.
*606 Even if there is a lack of specific scientific or medical data on the subject, plaintiffs experts’ opinion testimony may nevertheless be deemed sufficiently reliable if the process of “backwards cancer staging” and the bases for plaintiffs experts’ opinions are generally accepted in the medical community as being reliable. See Beckley, supra at 718-719. It may be that oncologists generally do engage in “backwards cancer staging” and that they consider certain specific factors in doing so. On the record before us, however, it is impossible to determine whether such conduct is generally accepted in the medical community. The trial court acted too hastily in precluding the testimony without more carefully examining the reliability of the testimony. We find that plaintiff should be given the opportunity to establish, by impartial and disinterested experts, that it is accepted in the medical community for doctors to engage in backwards cancer staging and to explain the bases for the propriety of engaging in such backward cancer staging, which might include the doctor’s individual knowledge and experience, the general knowledge in the scientific community, the type of cancer, the patient’s individual presentation, as well as additional relevant factors. It may be that the trial court will once again find the evidence to be too speculative and unreliable. Indeed, the fact that Drs. Veach and Singer could not agree on whether the decedent’s cancer was a slow-growing or fast-growing cancer underscores the reliability concerns with this type of evidence. Nevertheless, in the absence óf a more searching inquiry into the reliability of such evidence, we cannot affirm the trial court’s decision in this case.
Given the limited record before us, we are unable to determine whether testimony that the decedent’s lung cancer was at Stage I or Stage II in July 1997 was competent evidence. The trial court should have either *607 conducted a more searching inquiry under MRE 702 or a Davis-Frye evidentiary hearing before striking the testimony of plaintiffs causation experts. Therefore, we remand this case to the trial court. If, on remand, the trial court determines that plaintiffs experts’ testimony regarding “backwards cancer staging” is a novel scientific principle, then the trial court shall conduct a Davis-Frye evidentiary hearing. If the trial court determines that the evidence does not constitute a novel scientific principle, then the trial court shall conduct a more searching inquiry under MRE 702 to determine whether the testimony satisfies the three Beckley conditions articulated above.
Vacated and remanded. We do not retain jurisdiction.
Notes
See
People v Davis,
Although it is true that in certain clinical trials participants receive placebos, this rarely occurs in a clinical trial involving treatment for cancer. According to the American Cancer Society:
Placebos are rarely used alone in cancer research, unless no known effective treatments exist. It’s certainly not ethical to have someone take a placebo if an effective standard treatment is already available. When cancer clinical trials compare treatments, they compare the new treatment against the current standard treatment. At times, a study may be designed so that patients may not be told which one they are receiving, but they know they are at least getting the current standard of care. [American Cancer Society, Clinical Trials: What you Need to Know <http://www.cancer.org/docroot/ETO/content/ETO_6_3_ Clinical Trials_ -_Patient_ Participation.asp> (accessed October 6, 2005).]
