NEW : Britain 's Queen Elizabeth II is now out of King Edward VII 's Hospital . Gastroenteritis is an inflammation of the lining of the stomach and intestines . Gastroenteritis is an inflammation of the lining of the stomach and intestines . The illness can cause liver and kidney problems in the elderly , a doctor says . Elizabeth II was hospitalized ` ` as a precautionary measure , '' Buckingham ' says .
NEW : Britain 's Queen Elizabeth II is now out of King Edward VII 's Hospital . Gastroenteritis is an inflammation of the lining of the stomach and intestines . The illness can cause liver and kidney problems in the elderly , a doctor says . Elizabeth II was hospitalized ` ` as a precautionary measure , '' Buckingham ' says .