Secretary of State Hillary Clinton has been hospitalized after doctors discovered a blood clot during her follow-up exam on Sunday from a concussion she sustained several weeks ago.
Clinton spokesman Philippe Reinnes said the former first lady is being treated with anti-coagulants at New York-Presbyterian Hospital, where doctors can monitor her medication over the next 48 hours.
Doctors say the blood clot was located in a vein between the brain and the skull behind her right ear. Reinnes said doctors will continue to assess Clinton's condition and determine if any further action is required.
Doctors also say Clinton is "making excellent progress" and they are confident she will make a full recovery.
Clinton was suffering from a stomach virus earlier in December when she fainted due to dehydration, causing the concussion. She was scheduled to return to work at the State Department this week after being out for three weeks.
President Obama has nominated Sen. John Kerry as Clinton's successor if or when she steps down from office.