"The claimant in a workers' compensation case has the burden to prove all essential elements of her claim, including a causal connection between the injury and the job." Royal v. Advantica Rest. Group, Inc., 194 S.W.3d 371, 376 (Mo.App.W.D.2006) (citations and quotations omitted). "Determinations with regard to causation and work relatedness are questions of fact to be ruled upon by the Commission." Id. (citing Bloss v. Plastic Enters., 32 S.W.3d 666, 671 (Mo.App.W.D.2000)). Under the statute, "[a]n injury is clearly work-related if work was a substantial factor in the cause of the resulting medical condition or disability." § 287.020.2. On the other hand, "[a]n injury is not compensable merely because work was a triggering or precipitating factor." Id. "Awards for injuries 'triggered' or 'precipitated' by work are nonetheless proper if the employee shows the work is a 'substantial factor' in the cause of the
injury." "Thus, in determining whether a given injury is compensable, a 'work-related accident can be both a triggering event and a substantial factor.' Royal, 194 S.W.3d at 376 (quoting Bloss, 32 S.W.3d at 671).
"[T]he question of causation is one for medical testimony, without which a finding for claimant would be based upon mere conjecture and speculation and not on substantial evidence." Elliot v. Kansas City, Mo., Sch. Dist., 71 S.W.3d 652, 658 (Mo.App. W.D. 2002). Accordingly, where expert medical testimony is presented, "logic and common sense," or an ALJ's personal views of what is "unnatural," cannot provide a sufficient basis to decide the causation question, at least where the ALJ fails to account for the relevant medical testimony. Cf. Wright v. Sports Associated, Inc., 887 S.W.2d 596, 600 (Mo. banc 1994) ("The commission may not substitute an administrative law judge's opinion on the question of medical causation of a herniated disc for the uncontradicted testimony of a qualified medical expert."). Van Winkle v. Lewellens Professional Cleaning, Inc., 358 S.W.3d 889, 897, 898 (Mo.App. W.D. 2008).
Pertaining to the 2006 work-related accident, the claimant truthfully testified that while he was adjusting a load of cardboard on or about November 9, 2006, he suffered an onset of pain in his left shoulder in an area of the left shoulder that was different from the location of his 2002 left shoulder injury. The claimant had a prior left shoulder injury from 2002 that was settled for 27.5 % of the left shoulder, which infers that the claimant had a 27.5 % pre-existing permanent partial disability in the left shoulder. See Section 287.190.6(1), RSMo Supp. 2009.
Dr. Cohen, an examining physician, examined the claimant and opined that the 2006 work-related accident was the prevailing factor in causing the injury and the need for subsequent medical treatment. See Exhibit O, pages 7 and 8.
On the other hand, Dr. Nogalski, another qualified examining physician, opined that the 2006 work-related accident was not the prevailing factor in causing the injury and that the prevailing factor causing the condition and disability was a chronic preexisting condition. He also opined that the prior injury from 2002, although at the left shoulder level, involved a different part of the shoulder when compared to the present injury. On December 10, 2008, Dr. Nogalski reported:
There was noted to be a large rotator cuff tear involving the supraspinatus tendon. This would be in the previous area where he had a tear before (referring to the 2002 injury) and this issue apparently had been addressed surgically by Dr. Marcus in the past and a settlement received for this. ...
The predominant argument against his work being the prevailing factor is the chronic nature of these findings which strongly suggest that he had significant rotator cuff and bicipital tendinopathy. His mechanism, that of pushing on a load of cardboard, appears to be inconsistent with what I would consider reasonable for a tear in this setting especially when \#1 there appeared to be some unhappiness about his change in work activities and \#2, his findings at the time of surgery appeared to be chronic in this disputed matter. It is probable that his three conditions... are indeed chronic in nature. See Exhibit R.
Dr. Yamaguchi, the operating surgeon, opined that the claimant's work injury of November 9, 2006, was the "predominant factor" causing the injury and the need for the subsequent medical treatment. See Exhibit G, page 2. On June 30, 2009, he reported:
It is a very difficult question to answer. I was not the treating physician in 2003 and thus do not know exactly what the extent of his injuries were. I can say however, that the supraspinatus and anterior portion of the infraspinatus tendon tears appear to have been chronic. Therefore, he had had these tears for some time and they may have represented a lack of healing of his previous surgery. Alternatively, they may have represented tears that were present that reformed after his 2003 surgery but prior to his 2006 injury. His operative findings do support, however, that he may have had a recent injury most consistent with his episode in November of 2006. ... It is my opinion that Mr. Spies work injury on November 9, 2006, was the predominant factor necessitating the surgery I performed on June 28, 2007. Prior to this injury, he was functioning well in [a] manual labor capacity. Following the injury he was substantially worse. There were elements of his surgery that suggest that although he had a chronic condition, it was substantially aggravated or increased by the injury of November 9, 2006. Many people have rotator cuff tears and function essentially normally with these tears. Once these tears enlarge, however, they can create a situation where previously well-functioning, but torn rotator cuff, can become totally dysfunctional. That is what I believe is the case with Mr. Spies. His new injury consisting of an increase in the size of his previous tear, as well as a new tear of the subscapularis and a potentially new tear of the biceps tendon substantially aggravated his preexisting condition to the point that a stable shoulder not requiring surgery then required surgery. See Exhibit G.
There is an internal consistency between the reports from Dr. Yamaguchi and the reports from Dr. Nogalski and Dr. Cohen. Namely, they agree that the claimant's left shoulder had chronic and pre-existing problems, including but not limited to tendon tears and a rotator cuff tear following the 2002 injury. Furthermore, they agree that the claimant experienced a sudden onset of pain on November 9, 2006. Finally, neither Dr. Yamaguchi nor Dr. Nogalski can state that the work-related incident of November 9, 2006, was "the prevailing factor" in causing the need for surgery or causing the need to miss work. However, Dr. Cohen opined that the claimant's 2006 work-related injury was the prevailing factor causing the claimant's medical condition and disability resulting from the 2006 accident. Dr. Yamaguchi's opinion that the question is hard to answer and has features of both preexisting conditions and the 2006 workrelated injury is most candid and credible. His opinion that the work injury on November 9, 2006, was the predominant factor necessitating the surgery supports a finding that that accident was the prevailing factor causing the medical condition and the disability after the 2006 accident.
Based on the weight of the evidence, the claimant suffered an aggravation of his preexisting shoulder problems, aggravating the chronic fraying of the infraspinatus tendon at a level different from the supraspinatus tendon that was injured in 2002 as a result of the 2006 workrelated accident. The claimant carried his burden of proof that the incident of November 9, 2006 was "the prevailing factor" in causing this aggravation of his pre-existing problems of the left
shoulder.