Section 287.220 RSMo creates the Second Injury Fund and provides when and what compensation shall be paid in "all cases of permanent disability where there has been previous disability." As a preliminary matter, we must ascertain the nature and extent of permanent disability referable to the primary injury considered alone. ABB Power T \& D Co. v. Kempker, 236 S.W.3d 43, 50 (Mo. App. 2007). We defer to and adopt as our own the administrative law judge's conclusion that the accident of March 21, 2009, was the prevailing factor causing employee to suffer head and neck injuries, but we find his disability rating to be somewhat inadequate. We find instead that the accident was the prevailing factor causing employee to suffer head and neck injuries with an associated 25 % permanent partial disability of the body as a whole.
The administrative law judge found that, at the time of the accident of March 21, 2009, employee suffered a 15 % preexisting permanent partial disability of the body as a whole referable to psychiatric conditions. We agree that employee suffered preexisting permanent partial disability referable to her psychiatric conditions; the administrative law judge's rating of 15 % of the body as a whole strikes us as reasonable. We disagree, however, with the administrative law judge's finding that employee's preexisting psychiatric disability does not combine with the effects of the work injury to render her permanently and totally disabled. Although the accident may not have been the prevailing factor causing employee to suffer additional permanent partial psychiatric disability, we are most persuaded by the opinions from Dr. Cohen and Phillip Eldred that
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that would be due for permanent total disability under section 287.200 out of ... the "Second Injury Fund."
(emphasis added).
The courts have declared that "the Second Injury Fund is not liable for any progression of claimant's preexisting disabilities not caused by claimant's last injury," Garcia v. St. Louis County, 916 S.W.2d 263, 266 (Mo. App. 1995)(emphasis added), but the cases applying this rule do not specify the degree of causation required, or that such must be sufficient that the employer would be liable under Chapter 287 for additional compensation. While employee's proof of causation may be insufficient to support an award of permanent partial disability benefits from the employer for psychiatric injury, nothing in the abovequoted language from $\S 287.220$ suggests employee's claim against the Second Injury Fund for permanent total disability must be rejected as a result. Instead, the statutory language specifically contemplates additional disability resulting from a combination effect whenever an employee's preexisting disabilities interact with the last injury to result in greater disability. We are of the opinion that, for purposes of establishing this combination effect, it is sufficient if the work injury is shown (as here) to have a significant causal relationship to progression of the preexisting disability, even if the accident is less than a prevailing factor in causing such progression.
Ultimately, the relevant question for our purposes is whether the last injury and employee's previous psychiatric disability "together result" in permanent total disability. See § 287.220.1, above. We have credited the testimony from Dr. Cohen and Mr. Eldred that employee is permanently and totally disabled owing to the combination of the effects of the work injury and her preexisting psychiatric disability. We discern nothing in the relevant case law that would prevent us from applying the plain language of $\S 287.220$ RSMo (which, of course, we must strictly construe) to assess compensation liability against the Second Injury Fund on the basis of the combinative effect between employee's preexisting disability and the last injury, which, in our view, "together result" in her permanent total disability.
For the foregoing reasons, we conclude employee is permanently and totally disabled owing to a combination of her preexisting disabling conditions in combination with the effects of the work injury. The Second Injury Fund is liable for permanent total disability benefits.