concurring in part and dissenting in part:
I agree with the majority that Wachter produced no evidence that Dr. Billig’s alleged surgical incompetence contributed to the failure of her saphenous vein grafts (SVG). The district court therefore properly granted summary judgment in favor of the United States on Wachter’s claim insofar as it focused on the failure of Bethesda personnel to disclose Billig’s purported surgical shortcomings.
However, the district court erred in granting summary judgment against Wachter insofar as she based her informed consent claim on the failure of Billig and other physicians at Bethesda to advise her of the internal mammary artery (IMA) procedure as an alternative to an SVG bypass. Wachter has raised genuine issues of material fact as to the three elements necessary to sustain an informed consent claim under Maryland law: (1) whether the physicians at Bethesda had a duty to disclose the existence of the IMA alternative as well as its risks and prospects for success, (2) whether a causal link existed between Wachter’s consent to the SVG bypass and the physicians' failure to disclose information about IMA and (3) whether Wachter suffered any harm as a result of undergoing the SVG procedure rather than the IMA alternative.
In upholding the grant of summary judgment, the majority has overlooked crucial evidence favorable to Wachter and has usurped the function of the fact finder by resolving disputed issues of material fact. For those reasons, I dissent from the majority decision on the IMA issue.
I. DUTY TO DISCLOSE
I begin with an issue that the majority declined to address, namely, whether the physicians at Bethesda had a duty to inform Wachter of the IMA alternative to the SVG bypass procedure. Maryland law imposes on physicians a duty to disclose the existence of alternatives to proposed surgery or treatment, as well as the risks and benefits adhering to each option, if such information would be “material to the intelligent decision of a reasonably prudent pa*263tient.” Sard v. Hardy, 281 Md. 432, 444, 379 A.2d 1014, 1022 (1977).
The evidence here would allow a trier of fact to find that a reasonable patient in 1983 would have considered information about IMA material to her decision to undergo bypass surgery.1 Dr. Brickman, Wachter’s expert, testified in deposition that medical evidence in 1983 demonstrated that IMA grafts had superior long-term patency rates (in other words, remained non-occluded or non-obstructed longer) than SVG grafts. Brickman also testified that he and other physicians in 1983 found IMA grafts especially preferable to the SVG option for women, such as Wachter, who had previously experienced blockage of saphenous vein grafts.
The IMA alternative had been used in bypass surgery since at least 1968, and Brickman pointed to medical studies from as early as 1980 indicating that IMA grafts remained patent longer than the saphenous vein grafts. The results of those studies were contained in a 1980 medical journal article which Wachter submitted in support of Brickman’s affidavit. In that article, at least one surgeon characterized IMA patency rates as “vastly superior” to those for saphenous vein grafts. Comparison of Saphenous Vein and IMA Grafts, Journal of Thoracic & Cardiovascular Surgery, Sept.1980, at 341 [hereinafter “Comparison ”].
To be sure, many physicians in 1983 apparently disagreed with Brickman over the relative merits of the IMA and SVG options. However, evidence of such disagreement in no way compels summary judgment in favor of the United States. A reasonable patient may find information about an alternative medical procedure material to her decisionmaking even though the medical community is divided over its relative benefits as compared to other surgical options. The medical community need not reach a consensus on the superiority of a particular surgical alternative before a physician has a duty under Maryland law to inform the patient of that option. The doctrine of informed consent in Maryland rests on the notion that the patient, not her physician, has the ultimate right to decide what is best for her own body:
Thus, the appropriate test is not what the physician in the exercise of his medical judgment thinks a patient should know before acquiescing in a proposed course of treatment; rather, the focus is on what data the patient requires in order to make an intelligent decision.
Sard, 281 Md. at 442, 379 A.2d at 1021. The patient cannot exercise her “fundamental right of physical self-determination,” id., when she is kept in the dark about a medical alternative favored by a significant number of physicians.
Wachter’s evidence at a minimum raises a factual question as to the degree of acceptance the IMA option enjoyed in the medical community in 1983. It is impossible to quantify, as a matter of law, the percentage of the medical community that must accept or favor a given alternative before that option becomes “material”. That percentage will vary depending on the circumstances of each case. In some cases, a reasonably prudent patient might find a medical alternative material to her decision even though only a minority of the medical community favored the procedure. To require a clear majority of the medical community to prefer a procedure before it could be considered a material option would fly in the face of the decision of the Maryland Court of Appeals in Sard, which expressly refused to allow the medical community’s view of the significance of a procedure to define the scope of the duty to disclose. See id.
Of course, certain procedures may be so experimental or accepted by such a small fringe of the medical community that, as a matter of law, information about them cannot be considered “material” to a reasonably prudent patient’s decisionmaking. However, Wachter has produced evidence that as early as 1980 many members of the medical community preferred the IMA option to the SVG for most bypass grafts. Moreover, Brickman’s testimony and the *264medical journal article submitted in support of his affidavit suggest that even some of the physicians who preferred SVG over IMA for first-time recipients of bypass grafts favored using IMA for patients who had previously received SVG grafts that had failed. At the very least, the evidence raises a question for the fact finder as to whether a reasonable patient in Wachter’s position in 1983 would have considered IMA a significant medical option.
That only about 20% of the hospitals in the United States offered the IMA procedure in 1983 does not render irrelevant a belief that a reasonably prudent patient could have considered information about IMA material to her decision to undergo bypass surgery.2 A patient who faces a serious health risk may wish to know about important medical procedures, particularly those that might prove highly successful, even though only a few hospitals offer such procedures. At any rate, 20% is a significant proportion of the hospitals in the country. That one-fifth of the medical facilities offered IMA strongly suggests that the procedure was neither purely experimental nor isolated to a small fringe of the medical community.
I find unacceptable the district court’s argument that, as a matter of law, the choice between SVG and IMA grafts represented a mere “choice of tactical surgical approaches” akin to a surgeon’s selection of which sutures to use or the location of an incision, and that Billig and his colleagues therefore had no duty to inform Wachter about the IMA option. Wachter v. United States, 689 F.Supp. 1420, 1424 (D.Md.1988).3 To be sure, some mechanical or technical choices in surgery will be so immaterial to a patient’s decisionmaking that, as a matter of law, the surgeon need not discuss them with the patient. The evidence here, however, would allow a trier of fact to find that the IMA option was more than an insignificant tactical choice, but instead was an important medical alternative which a reasonable patient would find material to her decision to submit to bypass surgery. That the medical community actively debated the relative benefits of IMA and SVG well before 1983 suggests that most patients in Wachter’s position would have wanted to know about the IMA option before deciding to have a second bypass operation.
The district court misconstrued Maryland law when it suggested that the doctrine of informed consent has no applicability whatsoever when the choice presented is between various techniques of accomplishing a type of operation (e.g., bypass surgery), instead of between surgery and a non-surgical treatment. See Wachter, 689 F.Supp. at 1424. Sard, the premier case on informed consent in Maryland, clearly demonstrates that a physician may have a duty under some circumstances to inform the patient of the various methods of performing a given operation. That case held, inter alia, that a jury could reasonably conclude that a physician had a duty to disclose to a patient the various methods of accomplishing female sterilization through *265tubal ligation. Sard, 281 Md. at 437, 445-46, 448, 379 A.2d at 1018, 1023, 1024. The physician in Sard had informed the patient of birth control methods other than tubal ligation, but had failed to discuss with her the most common methods of performing tubal ligation, even though success rates among the options varied considerably. Id. at 437, 379 A.2d at 1018. The facts of Sard belie the district court’s suggestion that once a physician discloses the alternatives to surgery, he or she never has a further duty to disclose the various methods of accomplishing the operation.
In sum, the evidence in the record raises a genuine issue as to whether a reasonably prudent patient would have considered information about IMA material to her decision to undergo bypass surgery. Were the IMA information material, Maryland law would have required Billig and his colleagues to discuss it with Wachter before performing surgery.
II. CAUSATION
I disagree with the majority’s assertion that Wachter has presented no evidence that she would have chosen the IMA procedure had she received information about it prior to her surgery on August 1, 1983. The majority has ignored crucial evidence in Wachter’s favor in reaching its conclusion.
Maryland has adopted an objective standard for determining causation in informed consent cases. No causal link exists between the plaintiff’s injury and the physician’s violation of the duty to disclose medical alternatives unless a reasonable person in the patient’s position would have made a different choice had she been fully informed. Sard, 281 Md. at 450, 379 A.2d at 1025. The evidence in the record would support a finding that a reasonable person in Wachter’s shoes would have chosen the IMA procedure over the SVG if given a choice.
The majority and the district court improperly dismissed as “bare conclusion” Brickman’s assertion that Wachter “was an ideal candidate for an IMA graft.” Contrary to the majority’s assertion, the record contains abundant support for Brickman’s conclusion. Brickman testified that the IMA grafts had a significantly greater pa-tency rate than the SVG. That opinion was echoed by a number of physicians who sang the praises of the IMA option in a medical journal article submitted in support of Brickman’s affidavit. Most notably, Brickman emphasized that IMA was especially preferable to SVG for patients, particularly females, who had earlier already experienced failure with saphenous vein grafts.
In concluding that Wachter would not have chosen IMA if given a chance, the majority places too much emphasis on the lack of consensus in the medical community in 1983 as to whether IMA or SVG was preferable for bypass grafts. The majority misperceives the nature of the dispute over IMA. Brickman emphasized that the conflict in the medical literature over IMA focused on the preferable approach for patients receiving bypass grafts for the first time, not on the proper choice for individuals, such as Wachter, who had already experienced failure of a saphenous vein graft. The medical journal article submitted in support of Brickman’s affidavit suggests that some physicians who preferred SVG to IMA grafts in first-time bypass operations would opt for IMA grafts the second time around in patients who had experienced SVG failure. For example, the article provides the following summary from Dr. Alexander S. Geha, a skeptic about claims of IMA superiority:
I really do not see much of a controversy. I do not think that, at present, the difference in results between these two types of grafts is worth the effort of dissecting the IMA and using it except in patients who have had failure of a previous vein graft or in whom a relatively high risk of occlusion of a vein graft into a small anterior coronary artery can be anticipated.
Comparison, at 339 (emphasis added). Even assuming, arguendo, that the evidence here would preclude a finding that a reasonable patient would have chosen IMA grafts for first-time bypass surgery, *266Wachter’s evidence would allow a fact finder to infer that such a patient would have opted for IMA in 1983 for a second bypass that was necessitated by previous failure of saphenous vein grafts.
To be sure, the government has presented evidence that the IMA alternative would have made the bypass operation more complicated and perhaps more dangerous than SVG surgery. A trier of fact could permissibly find, however, that a reasonable person in Wachter’s position would have chosen to risk the added surgical hazards in exchange for the greater likelihood of long-term success presented by the IMA alternative.
III. INJURY
Wachter can succeed on her informed consent claim only by showing that she suffered some injury by receiving the saphenous vein grafts rather than the IMA option. Under the circumstances presented here, Wachter need not prove that her bypass grafts would not have occluded had Billig performed the IMA procedure rather that the SVG. To require such a showing where the plaintiff has never received an IMA graft would present a virtually insurmountable barrier to her claim. Instead, Wachter need only show that she would have enjoyed a better chance of success with the IMA grafts than with the SVG.4
The evidence here would allow a fact finder to conclude that IMA grafts would have offered a greater likelihood of success for Wachter’s second bypass operation than the SVG option provided. Wachter produced evidence that IMA grafts provided greater long-term patency than saphe-nous vein grafts. Brickman, Wachter’s expert, also testified that IMA grafts were a particularly superior option for women who had previously experienced failure with saphenous vein grafts.
I find utterly unsupportable the majority’s assertion that the evidence “speaks with one voice that Wachter’s current health problems do not stem from the sort of bypass procedure used.” Majority Op. at 11. The majority apparently finds dis-positive the government’s assertion that Wachter’s bypass surgery would have required at least one saphenous vein graft, even if IMA were used. Wachter’s evidence contradicts the government’s allegation that her surgery could not have been performed with IMA grafts alone. The principal support for the government’s contention is Billig’s affidavit, which states that “Wachter was having a double bypass (left anterior descending and obtuse marginal grafts) and we could not use IMA for the obtuse marginal graft.” Although Brickman never contradicted Billig’s assertion that Wachter needed a double bypass, his affidavit does dispute Billig’s claim that IMA could not be used for both grafts. Specifically, Brickman declared in his affidavit that:
The left internal mammary artery can be used to bypass the left anterior descending or the obtuse marginal branch of the circumflex artery. The right internal mammary can be used to bypass either of the same two vessels.
(Emphasis added).
Even if Wachter’s double bypass would have required at least one SYG, that fact would not compel summary judgment in favor of the United States. The majority apparently assumes that had Wachter received both an SVG and IMA graft in the August 1983 surgery, the single SVG would have failed as it had after the first bypass surgery. Even were I to accept that assumption, I cannot agree with the majority’s further implicit assumption that Wachter would have been no better off with the combination of a successful IMA graft and an occluded SYG than with two occluded saphenous vein grafts. I respectfully submit that we on the panel simply lack the medical expertise to engage in such speculation, especially in the absence *267of any supporting evidence in the record. The question is a factual one best left to the trier of fact which would have the benefit of expert medical testimony.
IV. CONCLUSION
Wachter has raised a genuine issue of material fact as to each of the three elements — duty to disclose, causation and injury — she must prove to succeed on her informed consent claim under Maryland law. I therefore dissent from the majority opinion insofar as it upholds the grant of summary judgment on the IMA issue.
. The case turns on the state of medical knowledge in 1983, the year of Wachter’s surgery.
. It is unclear from Brickman’s deposition whether he meant that 20% of all hospitals in the United States offered the IMA option in 1983, or instead, that 20% of the nation’s hospitals that performed bypass surgery provided the IMA alternative. Whichever Brickman meant, his testimony suggests that IMA was available in 1983 at a significant number of medical centers in the United States.
. Although the recent decision of the Maryland Court of Special Appeals in Nash v. Raneri, 77 Md.App. 402, 550 A.2d 717 (1988), quoted extensively from the Wachter opinion below, nothing in Nash suggests that the Court of Special Appeals intended to endorse the district court’s analysis of the evidence or its decision to grant summary judgment. At most, Nash illustrates that Maryland law does not require a physician to discuss every tactical decision in surgery with the patient. I fully concur in that reading of Maryland law. What I And objectionable is the district court’s decision to deprive the fact finder of the opportunity to decide whether the IMA was an insignificant tactical surgical choice or, as Wachter asserts, an important medical option that she would have found material to her deci-sionmaking. Nash certainly did not endorse the district court’s depriving the fact finder of the opportunity to assess the materiality of the IMA procedure. In Nash, the trial court had allowed the jury to decide the informed consent issue, and the Court of Special Appeals agreed that the matter was properly left to the jury. See 77 Md.App. at 408-10, 550 A.2d at 720-21.
. Perhaps the standard would be different had Wachter undergone a third bypass operation using IMA grafts which subsequently occluded. Such failure of the IMA grafts would present strong evidence that the grafts would also have occluded had she received them in the second operation. However, I have seen no evidence in the record that Wachter had ■ submitted to a third bypass operation at the time the district court granted summary judgment.