Charleson, who starred as Monica Quartermaine on 'General Hospital' and was the longest-tenured cast member on the soap opera, died on Jan. 12

Just over a month after she died, Leslie Charleson ‘s cause of death has been revealed as “sequelae of blunt head trauma,” according to People. The condition results from a previous head injury, although the details of when and how the General Hospital star obtained that injury were not revealed.

General Hospital mainstay Leslie Charleson, who starred in over 2,000 episodes of the soap, died in January. But new documents show she may have been suffering from long-term effects of a head injury.