At issue in this case is whether an employee is required to prove unusual stress in order to receive worker's compensation benefits for a nervous disability that resulted from emotional stress. We conclude that an employee must prove unusual stress in order to receive such benefits and, accordingly, we reverse the circuit court's order affirming a Labor and Industry Review Commission decision, which held otherwise. Further, we remand the matter to the circuit court for further proceedings consistent with this opinion.
I. Background.
The following facts are undisputed and are contained in the administrative law judge's findings of fact. In October 1992, Elizabeth Neal worked as a custodian at the Milwaukee County Medical Complex. On the morning of October 27th, Neal was summoned to her immediate supervisor's office. Her supervisor brought out a number of concerns about Neal's job performance. Neal did not agree with her supervisor's assessment of her work, and became very upset and afraid. Neal experienced a tightness across her chest and as she left her supervisor's office, she felt weak and dizzy. She fainted and fell to the floor.
Neal was taken to the hospital emergency room. Over a period of four days, the hospital treated her for chest pain, chest pressure, and high blood pressure. Doctors diagnosed her upon discharge as suffering *258from vasovagal syncope (a fainting spell) and hypertension. After Neal's release from the hospital, she continued to receive follow-up care from her family physician, Dr. John Krueger. Dr. Krueger released Neal to return to work on November 23,1992, and she began working that day.
Neal filed a claim for worker's compensation benefits, which her employer, Milwaukee County, denied. Neal then filed an application for an administrative hearing seeking worker's compensation benefits. In her claim with the agency she alleged:
Chest pains and fainting caused blood pressure to get high, was in hospital for four days from this incident [brought] on by stress related from a confrontation with the supervisor in office. Went to my own private doctor after being released from County hospital doctors. He then continued to treat me for stress that gave bodily symptoms of high blood pressure, chest pains, anxiety attacks and sleeplessness.
Neal sought temporary total disability from October 27,1992, through November 23,1992.
Following a hearing, the administrative law judge found that Neal's disability was caused by emotional stress. The administrative law judge based this finding on the opinion testimony of Dr. Krueger. Further, the administrative law judge found that because Neal suffered from physical symptoms resulting from the emotional stress, she was entitled to the benefits.
Milwaukee County then sought review with the Commission, which adopted the administrative law judge's position. Finally, Milwaukee County appealed to the Milwaukee County Circuit Court, which also adopted the reasoning of the administrative law judge. *259The County now seeks review pursuant to § 102.23, Stats.
II. Analysis.
Worker's compensation benefits are solely the creatures of Chapter 102, Stats. See State v. LIRC, 136 Wis. 2d 281, 286, 401 N.W.2d 585, 588 (1987). "[T]he quasi-contractual status of the worker in relation to the employer is the result of a legislatively imposed social compact by which an employee acquires rights not recognized by the common law and the employer and its insurer are subject to only limited or scheduled liability." Id. at 287, 401 N.W.2d at 588.
To qualify for worker's compensation benefits under Chapter 102, Stats., an employee must establish the five conditions set forth in § 102.03(l)(a)-(e), STATS. The focus of this case is on the requirement that "the employe[e] sustains an injury." Section 102.03(l)(a), Stats. Section 102.01(2)(c) defines "injury," in part, as a "mental or physical harm to an employe[e] caused by accident or disease." Section 102.01(2)(c), STATS.
Wisconsin courts have "always exercised a degree of hesitancy in granting compensation for mental injuries — especially those injuries of non-traumatic causation." School District No. 1 v. DILHR, 62 Wis. 2d 370, 376, 215 N.W.2d 373, 376 (1974). Indeed, "claims for mental health under the [Worker's] Compensation Act should be examined with caution and carefulness because of the danger inherent in such casés of malingering." Johnson v. Industrial Comm'n, 5 Wis. 2d 584, 589, 93 N.W.2d 439, 443 (1958).
Thus, Wisconsin courts have consistently held that "mental injury non-traumatically caused must have resulted from a situation of greater dimensions than *260the day-to-day emotional strain and tension which all employees must experience." School District No. 1, 62 Wis. 2d at 377-78, 215 N.W.2d at 377. Hence, "[o]nly if the 'fortuitous event unexpected and unforeseen' can be said to be so out of the ordinary from the countless emotional strains and differences that employees encounter daily without serious mental injury will liability under Chapter 102 be found." Id. at 378, 215 N.W.2d at 377.1 .
We now turn to the agency decision in this case. The administrative law judge rejected the County's contention that Neal was "required to establish unusual stress to prevail in her claim." The administrative law judge, without citation to legal authority, stated: "Because [Neal] suffered physical complaints and injury as a result of job related stress, [Neal] is only required to prove medical causation between the job stress and the physical injury."
The Commission, in reviewing the administrative law judge's decision, stated:
[T]he requirement that an injured worker present evidence that her injury resulted from unusual stress on the job applies only in cases in which the applicant is making a claim for a non-traumatic mental stress injury. In this case, the applicant filed a claim based on the fact that she suffered a physical injury in the nature of tightness in her *261chest, dizziness and a fainting spell. The applicant is not making a claim for a non-traumatic mental injury, and therefore, the administrative law judge appropriately found that the applicant was not required to establish unusual stress to prevail in her claim.
In essence, this case hinges on the administrative agency's interpretation of § 102.01(2)(c), and its definition of "injury." We are not bound by an agency's interpretation of a statute. Harnischfeger Corp. v. LIRC, 196 Wis. 2d 650, 659, 539 N.W.2d 98, 102 (1995). In certain cases, however, we accord the agency's interpretation great weight. Id. at 660, 539 N.W.2d at 102.
Great weight deference is appropriate once a court has concluded that: (1) the agency was charged by the legislature with the duty of administering the statute; (2) that interpretation of the agency is one of long-standing; (3) that the agency employed its expertise or specialized knowledge in forming the interpretation; and (4) that the agency's interpretation will provide uniformity and consistency in the application of the statute.
Id. While we conclude that this is seemingly a case where we should give great weight to the agency's interpretation, this interpretation must also be consistent with past judicial analyses of the statute. Lisney v. LIRC, 171 Wis. 2d 499, 507, 493 N.W.2d 14, 16 (1992). In this case, we conclude the Commission's interpretation was not consistent with the holdings of School Dist. No. 1 and its progeny.
*262The Commission's decision is seemingly premised on a conclusion that only those employee claims for mentally caused mental injuries need be supported by the "unusual stress" test, and that those employee claims for mentally caused "nervous" injuries with physical symptoms must only prove medical causation between the job stress and the physical injury. See IB Arthur Larson, The Law of Workmen's Compensation § 42.23 at 7-876 (1996) (discussing "a mental or emotional stimulus resulting in a primarily 'nervous' injury."). We disagree with this interpretation of School Dist. No. 1. Indeed, as Milwaukee County notes in its brief: "It is practically impossible to imagine a mental injury which does not have some physical side effects." See School District No. 1, 62 Wis. 2d at 371, 215 N.W.2d at 374 (employee "unable to sleep or eat, was nauseated, had severe headaches and acute anxiety"); Swiss Colony v. DILHR, 72 Wis. 2d 46, 50, 240 N.W.2d 128, 130 (1976) (employee hospitalized for weight loss, insomnia, exhaustion and depression).2
In this case, both the administrative law judge and the Commission blurred Neal's stress-caused "nervous" injury with its physical symptoms. Physical symptomology is not the same as physical injury. To read the case law in such a manner destroys the dichotomy between purely mental injuries and physical injuries. Because the agency failed to grasp *263the psychogenic aspect of Neal's injury, it concluded that Neal was not required to prove unusual stress as a predicate for compensability under Chapter 102, STATS. The agency and the dissent are wrong; the School Dist. No. 1 "unusual stress" test is applicable to this case. See IB LARSON, supra at § 42.23(b) at 7-923 to 7-924 (discussing Wisconsin's "unusual-stress test"). Because the agency did not properly apply the law in this case, we must reverse the circuit court's order and remand the matter for resolution consistent with this opinion and the mandates of School Dist. No. 1 and its progeny.
By the Court. — Order reversed and cause remanded with directions.
See also Jenson v. Employers Mut. Casualty Co., 161 Wis. 2d 253, 269, 468 N.W.2d 1, 7-8 (1991) (concluding mental injury was compensable under Chapter 102 because conditions to which employee was exposed "were beyond those common to her occupational life."); Swiss Colony, Inc. v. DILHR, 72 Wis. 2d 46, 56, 240 N.W.2d 128, 133 (1976) (holding Worker's Compensation benefits were due where employee's mental disability was caused by "unusual work stress").
The Commission cites to Manitowoc County v. DILHR, 88 Wis. 2d 430, 276 N.W.2d 755 (1979), to support its interpretation. In Manitowoc County, a police officer had a heart attack after a high-speed chase; disability benefits were awarded. Manitowoc County is non-dispositive because compensability was conceded and thus not an issue before the supreme court.