General Hospital star Leslie Charleson passed away last month at 79. She was the longest-running actor on the ABC soap, playing Monica Quartermaine since 1977 when she took over the role.

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.

Leslie Charleson died in January at 79. Charleson portrayed Dr. Monica Quartermaine on the hit series for almost 50 years. The Emmy-nominated star died of blunt head trauma on Jan. 12 at age 79.