Possible Causes of Rehnquist's Fever

July 13, 2005 — -- Chief Justice William Rehnquist, who is being treated for thyroid cancer, has been hospitalized with a fever.

Dr. Robert Ferris of the University of Pittsburgh Cancer Institute told ABC News of several possible causes for the fever, though no information has been released by physicians treating Rehnquist.

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Rehnquist is among the estimated 23,600 Americans who are diagnosed with thyroid cancer each year. The following are some facts about this treatable form of cancer.