LOS ANGELES, CA (Catholic Online) - Deputy Assistant Secretary Philippe Reines said that the 65-year-old Clinton is at the New York-Presbyterian Hospital in Manhattan. Her health is being monitored.   

"Her doctors will continue to assess her condition, including other issues associated with her concussion," he said. "They will determine if any further action is required."

A physician at New York University Medical Center, Dr. Roshini Raj says it's not at all clear where Clinton's blood clot is, which is vitally important for understanding how serious her medical condition is.

"It's a little murky," Raj told television reporters. It is uncommon for a concussion alone to cause a blood clot.

Clinton was hospitalized Sunday after doctors discovered a blood clot stemming from a concussion she sustained earlier in the month.

Clinton had fainted earlier this month. She had been sick for several days with the flu and had canceled a trip to Morocco where she was to officially recognize the Syrian rebels.  

Initial reports indicate that Clinton may have developed a blood clot in her lower limbs as a result of prolonged rest and inactivity after her recent concussion.

A deep vein thrombosis, known as a DVT, or a dural venous sinus thrombosis, could be two types of blood clots treated with anticoagulants, said Dr. Alex Valadka, a spokesman for the American Association of Neurological Surgeons. A blood clot could be dangerous if it breaks free and lodges in a vital organ, such as the heart.

Said thrombosis is not necessarily life-threatening, and would require months of treatment with blood-thinning drugs, Dr. Inam Kureshi, chief of neurosurgery at Hartford Hospital says. "Usually hospitalization is more of a precaution," he said.

There is the possibility that Clinton developed a blood clot elsewhere, including her brain. Doctors interviewed would not speculate about treatment or prognosis for the secretary of state.

State Department officials said she was at home recovering in the days after her fainting. Officials also issued a statement from Dr. Lisa Bardack of Mount Kisco Medical Group and Dr. Gigi El-Bayoumi of George Washington University that provided more information about the secretary's condition.

"Secretary Clinton developed a stomach virus, leading to extreme dehydration, and subsequently fainted. Over the course of this week we evaluated her and ultimately determined she had also sustained a concussion.  

"We recommended that the Secretary continue to rest and avoid any strenuous activity, and strongly advised her to cancel all work events for the coming week.  We will continue to monitor her progress as she makes a full recovery."

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