Section 287.067 RSMo(2005) defines occupational disease as "an identifiable disease arising with or without human fault out of and in the course of the employment...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."
Claimant developed neck pain while working as a carpenter. This job required lifting heavy sheets of drywall and door frames, reaching and bending, and substantial overhead work. Claimant developed neck complaints while working as a carpenter and before he became an Estimator. Claimant reported his complaints to his supervisor in December 2007, and sought medical treatment as early as January 4, 2008.
Claimant's expert, Dr. Volarich, opined the repetitive nature of Claimant's overhead work was the prevailing factor in causing a C6-7 disc herniation. He explained the 2008 MRI showed a disc herniation and annular tear. Disc degeneration can cause some bulging or protrusions, but a herniation and annular tear usually take a traumatic event. Claimant's work involved lifting heavy items and he often rested 125 pound sheets of drywall on his head while putting in the drywall screws. This is a significant strain to the neck, and this repetitive work caused the disc herniation.
Employer's expert, Dr. Chabot, noted Claimant's symptoms began in late 2007, and were chronic and degenerative in nature. Claimant's disc herniation was due to chronic degenerative changes. He concluded Claimant's job duties were not the prevailing factor in the development of his condition because Claimant was an Estimator in 2008, and that job required little to no lifting. He also based his opinion on the fact that the 2008 medical records do not specify a work activity or event as the reason for the onset of his complaints.
Claimant's treating records from his primary care physician do not reveal any neck complaints until 2008. Claimant worked in a heavy duty, repetitive occupation until early 2008, after his neck complaints began. Dr. Chabot repeatedly justifies his causation opinion with the lack of medical documentation of a work injury or duty causing complaints in 2008. Claimant cannot be held accountable to report he had sustained an occupational disease until a medical expert has made a causal connection between the medical condition and a work-related activity. Claimant was not diagnosed with an occupational disease until well after his 2008 treatment.
I find the opinion of Dr. Volarich more persuasive. Claimant was working as a carpenter performing repetitive heavy overhead work when his symptoms began, and this work caused his symptoms to develop. I find Claimant's work was the prevailing factor in causing his condition.