External cause of work accident includes work duties significantly worsening pre-existing disease.

The Supreme Court quashed the lower court's dismissal of the plaintiff's claim to establish a work-related accident. The plaintiff suffered a herniated disc while lifting 5kg packages, arguing this duty significantly worsened her pre-existing discopathy diagnosed in 1993. The court ruled that performing daily work duties can constitute an external cause if they significantly aggravate an existing illness, thereby allowing the case to be retried.