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

Michael Tullberg/Getty Images General Hospital star Leslie Charleson’s cause of death has been revealed, reports TMZ. Charleson died of blunt head trauma on January 12 at the age of 79, reported the outlet on Thursday,

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.