Section 287.220.1 RSMo., provides SIF is implicated in all cases of permanent partial disability where there has been previous disability that created a hindrance or obstacle to employment or re-employment, and the primary injury along with the pre-existing disability(s) reach a threshold of 50 weeks ( 12.5 % ) for a body as a whole injury or 15 % of a major extremity. The combination of the primary and preexisting conditions must produce additional disability greater than the simple sum of the conditions.
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[^0]: ${ }^{1}$ Dr. Volarich also rated other preexisting conditions that are not a part of the parties' stipulations.
Claimant's primary injury settled by compromise and produced BAW PPD disability of 48.5 % referable to the cervical spine. The parties stipulate to this level of disability, and I adopt this PPD percentage when considering Claimant's SIF claim. Claimant's documented preexisting disabilities involve his lumbar spine and left knee. The parties stipulated Claimant's lumbar spine disability represents 30 % BAW PPD, and his left knee disability represents 25 % PPD. I adopt these percentages when considering Claimant's SIF PPD claim. I further find these conditions to have been a hindrance or obstacle to his employment or reemployment.
Taking into account Claimant's preexisting disabilities, and combining these disabilities with his work related cervical spine injury; I find the combination synergistically produces a disability greater than the simple sum. Applying a 20 % load factor, I find SIF to be liable for 70.8 weeks of PPD disability or $\ 25,488.00.