This past weekend, Teresa Heinz Kerry was hospitalized. While the exact nature of her medical condition remained for a time unknown (or undisclosed), fortunately, earlier this morning, her condition was upgraded from critical to fair.

This afternoon, NBC News is reporting that Heinz Kerry had suffered a grand mal seizure.

Physicians are still unclear as to what caused the seizure:

Heinz Kerry’s seizure could be related to her previous treatment for breast cancer, said Dr. Orrin Devinsky, director of the Comprehensive Epilepsy Center at New York University Langone Medical Center. The cancer can spread to the lining of the brain or to the brain itself, causing a grand mal seizure.

“I wouldn’t say it is likely; I would say it is a possibility,” Devinsky said.

Our thoughts and prayers continue to be with Heinz Kerry and her family.