U.S. Secretary of State Hillary Clinton remained hospitalized Wednesday for treatment of a blood clot in her head, as daughter Chelsea tweeted from her bedside.
After being photographed looking visibly distraught outside the hospital, Chelsea wrote that she was grateful to be starting the new year with her family.
"Wishing all a healthy & happy 2013," Chelsea, 32, wrote.
"Grateful to be starting the new year with my family."
Former President Bill Clinton has been spotted driving to and from his wife's side at New York-Presbyterian Hospital for much of the past 48 hours.
Hillary was hospitalized with a blood clot in a vein behind her right ear that helps carry blood away from the brain. She's being treated with blood thinners.
In a statement yesterday, doctors assured it was not a life-threatening condition and assured that Clinton had suffered no brain damage or stroke.
"In all aspects of her recovery, the Secretary is making excellent progress and we are confident she will make a full recovery," Drs. Lisa Bardack and Gigi El-Bayoumi said.
A blood clot occurs when a blockage builds up, either from partial thrombus (coagulated blood) or outside compression of some kind. It can be fatal.
When the vein becomes blocked, the coagulated blood may extend to veins draining the area, which could lead to a lack of oxygen and tissue death.
The condition can be treated with blood thinners administered over several months until the clot breaks down. Hillary also has another key factor in her favor.
"The particular vein they're talking about, there are enough other areas for the blood to travel through so it doesn't build up in the brain," Dr. Sanjay Gupta told CNN.
Doctors are keeping her under their watchful eye just the same.
Aides and doctors say Hillary contracted a stomach virus in early December and became dehydrated, then fainted, fell and hit her head on December 9.
She was diagnosed with a concussion and hasn't been seen in public since. She will leave her post once John Kerry is confirmed as her replacement.