Negligence must be proven on the basis of four, separate elements. These are a duty, breach of duty, causation, and harm. A railroad company owes its employees a legal duty of care to make reasonable provisions for their welfare and wellbeing. Therefore, if the railroad company breaches its duty, such as by neglecting to provide safe working conditions, and an employee later develops esophageal cancer as a result, the company could be responsible for the employee’s damages. Other common examples of railroad employer negligence relating to esophageal cancer claims are failing to properly train workers, noncompliance with federal safety regulations, and the use of unsafe equipment.