A Wisconsin Workers’ Compensation Review Board upheld the denial of benefits to a widow who claimed that her husband died as a result of inhaling nickel fumes contained in welding fumes. The widow claimed that the decedent, a welder and machinist, developed lung cancer as a result of welding fumes. The widow’s expert opined that the decedent was exposed to nickel oxide while welding nickel alloys. However, the expert also conceded that no conclusive link had been established between lung cancer and exposure to chromium or nickel fumes.