Britain's 86-year-old monarch Queen Elizabeth is hospitalized Sunday with symptoms of gastroenteritis. The Queen first developed symptoms of the stomach bug Friday. She was taken to the hospital as a precautionary measure. A Palace spokesman said she is in good spirits and her condition is not deteriorating. All of the queen's engagements for the coming week have been canceled or postponed. It is unusual for the monarch, who is very diligent in carrying out her royal duties, to cancel any engagement. The head of state, who celebrated 60 years on the throne last year, is known for her robust health. She was last hospitalized in 2003 when she had a knee operation.