reports of symptoms of depression and anxiety, childhood neglect and abuse, panic attacks and stress, and Ms. Toon's diagnosis of "major depression, recurrent; post-traumatic stress disorder; generalized anxiety disorder and gambling addiction." ${ }^{1}$ Mr. Lalk documented the employee's discussion of suicide ideation without intent in 2008 and her admission to an employer-provided partial day hospital program that year. His report referenced records from Srinivas
Chilakamarri, M.D. and the Hyland Behavioral Health Center showing employee's admission to Hyland on March 23, 2009, for suicidal ideation and homicidal ideation and her diagnosis there of "major depression, single episode, severe." ${ }^{2}$ He noted that the employee was admitted to St. Anthony's Medical Center on December 3, 2009, "because she was reporting thoughts of suicide, thoughts of wanting to die, panic attacks, decreased sleep and decreased appetite." ${ }^{3}$ Mr. Lalk referenced Dr. Eli Shuter's May 24, 2011, independent medical examination and March 3, 2012, report, which noted that EE continued to have symptoms of "low mood, daily crying, lack of energy, anhedonia, fear of making wrong decisions, being a burden to her family, worthlessness, guilt and hopelessness." ${ }^{4}$ Mr. Lalk referenced the May 15, 2017, report of psychiatrist Dr. Adam Sky, who assessed the employee as having "major depressive disorder; moderate to severe, recurrent; generalized anxiety disorder, post-traumatic stress disorder, [and] gambling disorder by history. . ."5 He noted Dr. Sky's opinion that the employee "had a 100 % permanent, partial psychiatric disability to the body as a whole with the prevailing cause being the combination of her pre-existing permanent, partial psychiatric disability synergistically combined with her primary occupational disease." ${ }^{6}$ Mr. Lalk recounted the employee's account during his meeting with her of physical and emotional abuse as a child, depression off and on throughout her life, and anxiety. Mr. Lalk found that due to symptoms and limitations as reported by the employee and Dr. Sky's opinion regarding the relationship between the employee's current level of psychiatric distress and all of her physical symptoms and limitations, the employee was unable to secure and maintain employment in the labor market or compete for any positions. Mr. Lalk concluded that the employee could perform in a sedentary or near sedentary job with as-needed access to a bathroom in an unskilled, entry level position only if her psychiatric condition improved to the point where a psychiatrist believed "her to be able to function consistently and at a reasonable pace and . . .in the presence of other workers, supervisors, and the public." ${ }^{7}$
Medical expert Dr. Volarich also opined, in his September 13, 2018, report, that the employee had a preexisting disability attributable to psychiatric disorders. Dr. Volarich deferred to a psychiatrist for assessment of the nature and extent of the employee's psychiatric disability. He further opined,
Based on my evaluation today, review of medical records, and review of a vocational assessment completed on 8/4/17 by Mr. Timothy G. Lalk, vocational assessment could not identify a job for which she could return to and thought that
[^0]
[^0]: ${ }^{1} Transcript, 681.
{ }^{2} Id., 682.
{ }^{3} Id., 683.
{ }^{4} Transcript, p. 684.
{ }^{5} Id., p. 686.
{ }^{6}$ Id., p. 695. Dr. Sky explained this somewhat confusing evaluation in a cover letter that accompanied his May 15, 2017, IME. In this letter Dr. Sky explained, "As noted in my report, I feel [the employee] has a permanent total psychiatric disability, 35 % of which was attributable to a preexisting psychiatric condition. It is my opinion that the preexisting psychiatric condition in combination with her work injury permanently and totally disabled her from a psychiatric standpoint. . . I feel that her preexisting psychiatric condition was a hindrance to employment prior to the work injury of February 10, 2009 though because an insurmountable obstacle and hindrance to employment subsequent to that injury." Transcript, 463.
${ }^{7}$ Id., pp. 696-697.
she was permanently disabled primarily as a result of her psychiatric disorders. I concur with that assessment. ${ }^{8}$
The uncontroverted expert opinions of vocational rehabilitation specialist Mr. Lalk and Dr. Volarich are consistent with the employee's testimony regarding her longstanding struggle with depression and anxiety, as well as the employer's clinic treatment records.
Based on this evidence, we find the employee had a significant preexisting psychiatric disability that was a hindrance or obstacle to obtaining and maintaining employment. We further find, based on the competent and substantial evidence in the record as a whole, including Dr. Adam Sky's IME, that the employee suffered preexisting psychiatric disability in the amount of 28 % PPD at the 400-week of the body as a whole level, totaling 112 weeks.
We credit the expert medical opinion of Dr. Volarich that the employee's preexisting psychiatric disability combined synergistically with disability attributable to the employee's primary injury and her other preexisting disabilities to result in a disability that was substantially greater than the simple sum or total of each separate injury or illness. Based on Mr. Lalk's expert vocational opinion, we further find that disability from the employee's primary injury and her preexisting disabilities has rendered the employee unable to compete for any position or secure and maintain employment in the open labor market.
The uncontroverted medical and vocational expert opinion evidence in the record supports the conclusion that the employee is PTD as a result of significant, longstanding preexisting psychiatric disability in combination with disability from her primary injury and other preexisting disabilities. No evidence in the record supports the conclusion that the employee is PTD solely because of the deterioration of her psychiatric condition after her 2009 primary injury. The fact that, after her primary injury, the employee experienced divorce and the death of a spouse and elected to accept the employer's retirement option offered in conjunction with its plant closing does not constitute medical testimony as to the cause of the employee's PTD. We are not authorized to substitute our own opinion, unsupported by competent and substantial evidence in the record, regarding the medical causation of the employee's permanent total disability. See Abt v. Miss Lime Co., 388 S.W.3d 571, 581 (Mo. App. 2012) and Williams v. City of Jennings 605 S.W.3d 152, 160 (Mo. App. 2020).