Based on the substantial and competent evidence, the stipulations of the parties, and the application of the Workers' Compensation Law, I make the following Rulings of Law:
- Did Claimant sustain injuries by accident or occupational disease arising out of and in the course of his employment for Employer on or about June 12, 2009 and January 30, 2010 ?
Section 287.808, RSMo ${ }^{1}$ provides:
The burden of establishing any affirmative defense is on the employer. The burden of proving an entitlement to compensation under this chapter is on the employee or dependent. In asserting any claim or defense based on a factual proposition, the party asserting such claim or defense must establish that such proposition is more likely to be true than not true.
Section 287.800, RSMo provides:
- Administrative law judges, associate administrative law judges, legal advisors, the labor and industrial relations commission, the division of workers' compensation, and any reviewing courts shall construe the provisions of this chapter strictly.
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[^0]: ${ }^{1}$ All statutory references are to RSMo 2006 unless otherwise indicated. In a workers' compensation case, the statute in effect at the time of the injury is generally the applicable version. Chouteau v. Netco Construction, 132 S.W.3d 328, 336 (Mo.App. 2004); Tillman v. Cam's Trucking Inc., 20 S.W.3d 579, 585-86 (Mo.App. 2000). See also Lawson v. Ford Motor Co., 217 S.W.3d 345 (Mo.App. 2007).
- Administrative law judges, associate administrative law judges, legal advisors, the labor and industrial relations commission, and the division of workers' compensation shall weigh the evidence impartially without giving the benefit of the doubt to any party when weighing evidence and resolving factual conflicts.
Section 287.020.2, RSMo provides:
The word 'accident' as used in this chapter shall mean an unexpected traumatic event or unusual strain identifiable by time and place of occurrence and producing at the time objective symptoms of an injury caused by a specific event during a single work shift. An injury is not compensable because work was a triggering or precipitating factor.
Section 287.020.3, RSMo provides in part:
- (1) In this chapter the term 'injury' is hereby defined to be an injury which has arisen out of and in the course of employment. An injury by accident is compensable only if the accident was the prevailing factor in causing both the resulting medical condition and disability. 'The prevailing factor' is defined to be the primary factor, in relation to any other factor, causing both the resulting medical condition and disability.
(2) An injury shall be deemed to arise out of and in the course of the employment only if:
(a) It is reasonably apparent, upon consideration of all the circumstances, that the accident is the prevailing factor in causing the injury; and
(b) It does not come from a hazard or risk unrelated to the employment to which workers would have been equally exposed outside of and unrelated to the employment in normal nonemployment life.
(3) An injury resulting directly or indirectly from idiopathic causes is not compensable.
(5) The terms 'injury' and 'personal injuries' shall mean violence to the physical structure of the body. . . .
Section 287.020.10, RSMo provides:
In applying the provisions of this chapter, it is the intent of the legislature to reject and abrogate earlier case law interpretations on the
meaning of or definition of 'accident', 'occupational disease', 'arising out of', and 'in the course of the employment' to include, but not be limited to, holdings in: Bennett v. Columbia Health Care and Rehabilitation, 80 S.W.3d 524 (Mo.App. W.D. 2002); Kasl v. Bristol Care, Inc., 984 S.W.2d 852 (Mo.banc 1999); and Drewes v. TWA, 984 S.W.2d 512 (Mo.banc 1999) and all cases citing, interpreting, applying, or following those cases.
Occupational diseases are compensable under the Missouri Workers' Compensation Act. Sections 287.067.1, 2, RSMo. An employee's claim for compensation due to an occupational disease is to be determined under Section 287.067.1, RSMo. It defines occupational disease as:
- In this chapter the term 'occupational disease' is hereby defined to mean, unless a different meaning is clearly indicated by the context, an identifiable disease arising with or without human fault out of and in the course of the employment. Ordinary diseases of life to which the general public is exposed outside of the employment shall not be compensable, except where the diseases follow as an incident of an occupational disease as defined in this section. The disease need not to have been foreseen or expected but after its contraction it must appear to have had its origin in a risk connected with the employment and to have flowed from that source as a rational consequence.
Section 287.067.2, RSMo provides:
- An injury by occupational disease is compensable only if the occupational exposure was the prevailing factor in causing both the resulting medical condition and disability. The 'prevailing factor' is defined to be the primary factor, in relation to any other factor, causing both the resulting medical condition and disability. Ordinary, gradual deterioration, or progressive degeneration of the body caused by aging or by the normal activities of day-to-day living shall not be compensable.
Section 287.067.3, RSMo provides:
An injury due to repetitive motion is recognized as an occupational disease for purposes of this chapter. An occupational disease due to repetitive motion is compensable only if the occupational exposure was the prevailing factor in causing both the resulting medical condition and
disability. The 'prevailing factor' is defined to be the primary factor, in relation to any other factor, causing both the resulting medical condition and disability. Ordinary, gradual deterioration, or progressive degeneration of the body caused by aging or by the normal activities of day-to-day living shall not be compensable.
Section 287.067.8, RSMo provides:
With regard to occupational disease due to repetitive motion, if the exposure to the repetitive motion which is found to be the cause of the injury is for a period of less than three months and the evidence demonstrates that the exposure to the repetitive motion with the immediate prior employer was the prevailing factor in causing the injury, the prior employer shall be liable for such occupational disease.
Section 287.063.1 provides:
An employee shall be conclusively deemed to have been exposed to the hazards of an occupational disease when for any length of time, however short, he is employed in an occupation or process in which the hazard of the disease exists, subject to the provisions relating to occupational disease due to repetitive motion, as is set forth in subsection 8 of section 287.067 .
Claimant must present substantial and competent evidence that he or she has contracted an occupationally induced disease rather than an ordinary disease of life. The Courts have stated that the determinative inquiry involves two considerations: "(1) whether there was an exposure to the disease which was greater than or different from that which affects the public generally, and (2) whether there was a recognizable link between the disease and some distinctive feature of the employee's job which is common to all jobs of that sort." Polavarapu v. General Motors Corp., 897 S.W.2d 63, 65 (Mo.App. 1995); Dawson v. Associated Elec., 885 S.W.2d 712, 716 (Mo.App 1994), overruled in part on other grounds by Hampton v. Big Boy Steel Erection, 121 S.W.3d 220, 228 (Mo.banc 2003) ${ }^{2}$; Hayes v. Hudson Foods, Inc., 818 S.W.2d 296, 300 (Mo.App 1991); Prater v. Thorngate, Ltd., 761 S.W.2d 226, 230 (Mo.App 1988); Sellers v. Trans World Airlines, Inc., 752 S.W.2d 413, 415 (Mo.App 1988); Jackson v. Risby Pallet and
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[^0]: ${ }^{2}$ Several cases are cited herein that were among many overruled by Hampton on an unrelated issue (Id. at 224-32). Such cases do not otherwise conflict with Hampton and are cited for legal principles unaffected thereby; thus Hampton's effect thereon will not be further noted.
Lumber Co., 736 S.W.2d 575, 578 (Mo.App. 1987). In proving up a work-related occupational disease, "[a] claimant's medical expert must establish the probability that the disease was caused by conditions in the work place." Smith v. Donco Const., 182 S.W.3d 693, 701 (Mo.App. 2006) (citing Brundige v. Boehringer Ingelheim, 812 S.W.2d 200, 202 (Mo.App. 1991) (quoting Sheehan v. Springfield Seed \& Floral, Inc., 733 S.W.2d 795, 797 (Mo.App. 1987)); Dawson, 885 S.W.2d at 716. There must be medical evidence of a direct causal connection between the conditions under which the work is performed and the occupational disease. Coloney v. Accurate Superior Scale Co., 952 S.W.2d 755 (Mo.App. 1997); Dawson, 885 S.W.2d at 716; Sheehan v. Springfield Seed \& Floral, Inc., 733 S.W.2d 795, 797 (Mo.App. 1987); Estes v. Noranda Aluminum, Inc., 574 S.W.2d 34, 38 (Mo.App. 1978). Even where the causes of the disease are indeterminate, a single medical opinion relating the disease to the job is sufficient to support a decision for the employee. Dawson, 885 S.W.2d at 716; Prater v. Thorngate, Ltd., 761 S.W.2d 226, 230 (Mo.App. 1988).
In claims for compensation for medical conditions associated with repetitive activities, a claimant must prove: 1) the injury arose out of and in the course of employment; 2) causation from job-related activities; and 3) nature and extent of disability. Kintz v. Schnucks Markets, Inc., 889 S.W.2d 121, 124 (Mo.App. 1994). Manipulations and flexions, iterated and reiterated within a concentrated time, are unusual conditions, and if they inhere in an employment task being performed by an employee, they expose the employee who performs them to a risk not shared by the public generally and to which the employee would not have been exposed outside of employment, and thus qualify for compensation pursuant to The Law. Collins v. Neevel Luggage Manufacturing Company, 481 S.W.2d 548, 555 (Mo.App. 1972).
The court in State ex rel. KCP \& L Greater Missouri Operations Co. v. Cook, 2011 WL 4031146, 33 (Mo.App. 2011) states:
Employer liability for occupational disease claims does not depend on those claims falling within § 287.120. Section 287.120.1 specifies employer liability for "personal injury or death of the employee by accident," and provides that the administrative workers' compensation remedy is exclusive of other remedies with respect to such claims. Section 287.120.1 is not the only provision that imposes liability on employers for work-related injury claims, however. With respect to occupational disease claims, $\S 287.063$ provides:
- An employee shall be conclusively deemed to have been exposed to the hazards of an occupational disease when for any length of time, however short, he is employed in an occupation or process in which the hazard of the disease exists, subject to the provisions relating to
occupational disease due to repetitive motion, as is set forth in subsection 8 of section 287.067 .
- The employer liable for the compensation in this section provided shall be the employer in whose employment the employee was last exposed to the hazard of the occupational disease prior to evidence of disability, regardless of the length of time of such last exposure, subject to the notice provision of section 287.420 .
Similarly, § 287.067.2 provides for the compensability of occupational disease claims generally:
An injury by occupational disease is compensable only if the occupational exposure was the prevailing factor in causing both the resulting medical condition and disability. The "prevailing factor" is defined to be the primary factor, in relation to any other factor, causing both the resulting medical condition and disability. Ordinary, gradual deterioration, or progressive degeneration of the body caused by aging or by the normal activities of day-to-day living shall not be compensable.
Notably—and unlike the prior statute-these provisions make occupational disease claims compensable, and make employers liable for such claims, without reference to the definition of "accident" in § 287.020.2. Thus, such claims are made compensable under the Act, and employers are rendered liable for such claims, independently of $\S$ 287.120, including its exclusivity provisions.
The claimant in a workers' compensation proceeding has the burden of proving all elements of the claim to a reasonable probability. Cardwell v. Treasurer of State of Missouri, 249 S.W.3d 902, 912 (Mo.App. 2008); Cooper v. Medical Center of Independence, 955 S.W.2d 570, 575 (Mo.App. 1997), overruled on other grounds by Hampton v. Big Boy Steel Erection, 121 S.W.3d 220, 226 (Mo. banc 2003). The quantum of proof is reasonable probability. Thorsen v. Sachs Elec. Co., 52 S.W.3d 616, 620 (Mo.App.2001); Downing v. Willamette Industries, Inc., 895 S.W.2d 650, 655 (Mo.App. 1995); Fischer v. Archdiocese of St. Louis, 793 S.W.2d 195, 199 (Mo.App. 1990). "Probable means founded on reason and experience which inclines the mind to believe but leaves room to doubt." Thorsen, 52 S.W.3d at 620; Tate v. Southwestern Bell Telephone Co., 715 S.W.2d 326, 329 (Mo.App 1986); Fischer, 793 S.W.2d at 198. Such proof is made only by competent and substantial evidence. It may not rest on speculation. Griggs v. A. B. Chance Company, 503 S.W.2d 697, 703 (Mo.App. 1974). Expert testimony may be required where there are complicated medical issues. Goleman v. MCI
Transporters, 844 S.W.2d 463, 466 (Mo.App. 1992). "Medical causation of injuries which are not within common knowledge or experience, must be established by scientific or medical evidence showing the cause and effect relationship between the complained of condition and the asserted cause." Thorsen, 52 S.W.3d at 618; Brundige v. Boehringer Ingelheim, 812 S.W.2d 200, 202 (Mo.App 1991).
Where there are conflicting medical opinions, the fact finder may reject all or part of one party's expert testimony which it does not consider credible and accept as true the contrary testimony given by the other litigant's expert. Kelley v. Banta \& Stude Constr. Co. Inc., 1 S.W.3d 43, 48 (Mo.App. 1999); Webber v. Chrysler Corp., 826 S.W.2d 51, 54 (Mo.App. 1992); Hutchinson v. Tri-State Motor Transit Co., 721 S.W.2d 158, 162 (Mo.App. 1986). The Commission's decision will generally be upheld if it is consistent with either of two conflicting medical opinions. Smith v. Donco Const., 182 S.W.3d 693, 701 (Mo.App. 2006). The acceptance or rejection of medical evidence is for the Commission. Smith, 182 S.W.3d at 701; Bowers v. Hiland Dairy Co., 132 S.W.3d 260, 263 (Mo.App. 2004). The testimony of Claimant or other lay witnesses as to facts within the realm of lay understanding can constitute substantial evidence of the nature, cause, and extent of disability when taken in connection with or where supported by some medical evidence. Pruteanu v. Electro Core, Inc., 847 S.W.2d 203, 206 (Mo.App. 1993), 29; Reiner v. Treasurer of State of Mo., 837 S.W.2d 363, 367 (Mo.App 1992); Fischer, 793 S.W.2d at 199. The trier of facts may also disbelieve the testimony of a witness even if no contradictory or impeaching testimony appears. Hutchinson, 721 S.W.2d at 161-2; Barrett v. Bentzinger Brothers, Inc., 595 S.W.2d 441, 443 (Mo.App. 1980). The testimony of the employee may be believed or disbelieved even if uncontradicted. Weeks v. Maple Lawn Nursing Home, 848 S.W.2d 515, 516 (Mo.App. 1993).
Claimant described his repetitive work activities as a mechanic for Employer for several years before his 2009 and 2010 upper extremity injuries. He lifted and pushed. He used air tools. Much of his work was done straight out over his head. I find Claimant's description of his work activities to be credible.
Dr. Koprivica testified it was his opinion that Claimant's workplace exposure risk in that cumulative injury was the direct, proximate and prevailing cause for his development of the multiple conditions affecting both upper extremities. He stated, "That included bilateral carpal tunnel syndrome that was treated surgically, bilateral chronic lateral epicondylitis that was treated surgically. Chronic medial epicondylitis and cubital tunnel syndromes bilaterally that were treated surgically." I find this opinion to be credible.
I believe and find that Claimant's occupational exposure and repetitive work activities for Employer was the prevailing factor in causing injuries to the left upper extremity and the right upper extremity and disability.
I do not find that Claimant's injuries were from accidents. Claimant did not attribute them to accidents, and the medical evidence does not either. I find that the credible evidence establishes that Claimant sustained gradual and progressive injuries which resulted from repeated and constant exposure to hazards he encountered in Employer's workplace that resulted in injuries to the left upper extremity and the right upper extremity and disability.
I find that the causation opinions of Dr. Koprivica are persuasive and credible and support the conclusion that Claimant's work for Employer was the prevailing factor in causing Claimant's injuries to the right upper extremity and the left upper extremity and disability.
I find that Dr. Koprivica's conclusions regarding causation prove the probability that Claimant sustained occupational diseases from repetitive work activities that was caused by conditions in Claimant's workplace while employed by Employer.
I find that Claimant has met his burden to prove that his repetitive work for Employer was the prevailing factor in causing injuries to his left upper extremity and his right upper extremity and resulting disability. I find that Claimant sustained compensable occupational diseases arising out of and in the course of his employment for Employer from repetitive work activities during his work for Employer in Injury Number 09-044464 and Injury Number 10-006737. I find that Claimant was exposed to a risk that was greater than and different from that which affects the public generally.
I find that on or about June 12, 2009 and January 30, 2010 Claimant sustained compensable injuries by occupational disease arising out of and in the course of his employment for Employer. I find Claimant's June 12, 2009 occupational disease was the prevailing factor in causing injury to his left upper extremity, and resulting disability to his left upper extremity. I find Claimant's January 30, 2010 occupational disease was the prevailing factor in causing injury to his right upper extremity, and resulting disability to his right upper extremity.