Claimant asserts that pulling himself onto the sweeper caused injury to his left shoulder, low back and both knees. The SIF contends Claimant's work activities lacked sufficient repetition to cause an occupational disease injury.
Claimant has the burden to prove all essential elements of a claim, including causation. Decker v. Square D Co., 974 S.W.2d 667, 670 (Mo.App. 1998). A claimant's medical expert in an occupational disease case must establish within a "reasonable probability" that the disease was caused by conditions in the work place. Pippin v. St. Joe Minerals Corp., 799 S.W.2d 898, 902. (Mo.App. 1999) (Citations omitted). ${ }^{6}$ 'Probable means founded on reason and experience which inclines the mind to believe but leaves room for doubt.' Thorsen v. Sachs Elec. Co. 52 S.W.3d 611, 620 (Mo.App. 2001) (Citations omitted). ${ }^{7}$ 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). (Citations omitted).
Section 287.067 .1 and 3 states:
1) "Occupational disease" is defined as... 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 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.
2) 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.
To prove an occupationally induced disease rather than an ordinary disease of life 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. Townser v. First Data Corp., 215 S.W.3d 237, 241-242 (Mo. App. 2007). "[T]he claimant must establish, generally through expert testimony, the probability that the occupational disease was caused by conditions in the work place. . . . A single medical opinion will support a finding of compensability even where the causes of the disease are indeterminate. The opinion may be based on a written report alone." Id. at 242.
I find Claimant to be generally credible. Although his recall is incomplete, he did not dispute the medical records which are consistent with his testimony and other records in evidence. Claimant reported problems with his knees and back and left shoulder increased when he pulled himself onto the sweeper.
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[^0]: ${ }^{6}$ Abrogated on other grounds by Washington by Washington v. Barnes Hosp., 897 S.W.2d 611, 41 A.L.R.5th 889 (Mo. Apr 25, 1995).
${ }^{7}$ This is one of several cases cited herein that were among those overruled, on an unrelated issue, by Hampton v. Big Boy Steel Erection, 121 S.W.3d 220, 224-32 (Mo. banc 2003). Such cases do not otherwise conflict with Hampton and are cited for legal principles unaffected thereby; thus I will not further note Hampton's effect.
I find credible Dr. Cohen's opinion that Claimant sustained injury to his left shoulder, knees, and low back from climbing on and off the sweeper with his left shoulder. Claimant pulled his body weight onto the sweeper with his left shoulder due to restrictions on his right shoulder, and limited range of motion of his low back and knees. Claimant could not distribute weight to both shoulders which placed stress on his left rotator cuff and caused a tear. The repetitive action also caused more injury to his preexisting knee and lumbar spine injuries.
I find Dr. Cantrell's opinion is not credible that Claimant sustained no shoulder injury because he did not improve after he stopped working and did not climb onto the sweeper enough to cause injury. In addition, Dr. Cantrell incorrectly reported that Claimant told Dr. Cohen he used his right leg and knee to climb onto the sweeper and held on with both hands. In reality, Claimant provided both doctors with a consistent history of repetitive use of his left arm and leg to climb onto the sweeper.
Based on credible testimony by Claimant and Dr. Cohen, medical records and reports, I find repetitive climbing onto the sweeper was the prevailing factor that caused Claimant's left shoulder tear and need for surgery. I find repetitive climbing with the left shoulder exposed Claimant to more injury than the general public to such injury. I find Claimant established a link between his left shoulder injury and the distinctive act of climbing onto the sweeper with his left arm. I find the occupational disease was medically causally related to the act of climbing onto the sweeper.