Background
Dennis Thorn worked for the West Virginia Department of Transportation for thirty-six years (1978–2014), primarily in highway maintenance roles. During his employment, Thorn was repeatedly exposed to paint and paint fumes, toluene, diesel exhaust, gasoline fumes, tar, asphalt fumes, and pesticides. He testified that he regularly sat beneath paint spray guns, handled toluene-based cleaners, and worked around diesel and gasoline equipment without respiratory protection.
In December 2019, Thorn was diagnosed with bladder cancer and kidney urothelial cancer, undergoing multiple surgeries including radical cystoprostatectomy in 2022. After seeing television advertisements for occupational disease claims in March 2022, Thorn consulted an attorney and filed an occupational disease claim in March 2024. A claim administrator rejected the claim as untimely and lacking sufficient causal connection to his employment. Thorn protested to the Workers’ Compensation Board of Review.
The Court’s Holding
The Intermediate Court of Appeals affirmed the Board’s reversal of the claim administrator’s denial. The court held that the claim was timely filed. Under West Virginia law, the three-year filing deadline for occupational diseases runs from when the claimant knew or should have known the disease was occupationally related, not from the date of last exposure. Although Thorn was diagnosed with cancer in 2019, there was no evidence he was informed by a physician that his disease had an occupational cause until April 8, 2024—making the March 2024 claim timely.
On the merits, the court affirmed the Board’s finding that Thorn established by a preponderance of evidence that his occupational exposures were a contributing factor in his development of bladder and kidney urothelial cancer. The Board credited the opinions of Dr. Mohamad Salkini, Thorn’s treating urologist with specialized expertise in urothelial cancer, and Jeffrey Kady, an occupational health expert. Both opined that prolonged exposure to paint fumes, diesel exhaust, gasoline fumes, and toluene were capable of causing or significantly contributing to Thorn’s cancers. The Board also found that medical literature supported this conclusion, including research on occupational exposure to gasoline, diesel exhaust, and organic solvents as carcinogenic factors. Where conflicting expert opinions existed, the court found the Board properly weighed the evidence and need not adopt the employer’s contradicting interpretation of medical literature.
Key Takeaways
- Occupational disease claims need not prove employment was the exclusive or sole cause—only that occupational exposure was a contributing factor.
- For diseases with latency periods, the three-year filing deadline runs from when the claimant knew or reasonably should have known of the occupational connection, not from the date of last exposure.
- Expert testimony from treating physicians with relevant specialization carries substantial weight, particularly when combined with supporting medical literature.
- When conflicting expert opinions exist and medical evidence is of equal weight, courts must adopt the resolution most favorable to the claimant.
- A claimant’s awareness of general health risks (e.g., that cancer exists) is distinct from knowledge of occupational causation; physician notification of causal connection marks the triggering event.
Why It Matters
This decision significantly impacts workers with cancer or other chronic diseases seeking occupational disease benefits in West Virginia. By measuring the filing deadline from when causation becomes apparent to the claimant—rather than from the last exposure date—the ruling acknowledges that latency diseases may not manifest until years after retirement. Workers who encounter medical information or expert testimony establishing occupational causation long after their final workday now have a clearer path to claim benefits.
The decision also reinforces that occupational disease compensation extends to conditions affecting the general public, provided occupational exposure substantially increases the risk. For workers in high-exposure industries like painting, road maintenance, and chemical handling, this affirms that cancer causation can be established through treating physicians’ opinions combined with peer-reviewed medical literature—even without precise quantification of exposure levels. Employers cannot simply dismiss claims by demanding scientific certainty when substantial evidence supports an occupational contribution.