Queen Elizabeth II released from hospital
March 4, 2013 -- Updated 1649 GMT (0049 HKT)
- 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 dehydration and kidney problems in the elderly, a doctor says
- Elizabeth II was hospitalized "as a precautionary measure," Buckingham Palace says
(CNN) -- Britain's Queen Elizabeth II was discharged Monday from a London hospital, where she was treated for symptoms of gastroenteritis.
The 86-year-old monarch had been taken to King Edward VII's Hospital on Sunday morning "as a precautionary measure," a Buckingham Palace spokesman said, speaking with customary anonymity.
The queen smiled as she left the hospital Monday.
It was the first time the queen had been hospitalized in a decade. Her official engagements for the week were postponed or canceled Sunday.
Elizabeth had already canceled a planned trip to Wales on Saturday after showing symptoms of the illness, Buckingham Palace said.
Should British princes do more?
Mark Saunders discusses Queen's illness
Why Queen Elizabeth will never abdicate
Five things to know about gastroenteritis
Gastroenteritis is an inflammation of the lining of the stomach and intestines. Though commonly known as "stomach flu," it is not caused by the influenza virus, according to the U.S. Centers for Disease Control and Prevention.
The illness is usually caused by a virus and passed from person to person, said Dr. Corey Siegel, a gastroenterologist and professor at Dartmouth College's Geisel School of Medicine. But it can also be caused by bacteria, either foodborne or personally transmitted, he said.
The bug usually has to run its course. But doctors often give hospitalized elderly patients intravenous fluids to prevent dehydration, which can lead to kidney problems, Siegel said.
Queen's illness: Concern behind the castle walls
Elizabeth celebrated her 60th anniversary on the throne in 2012 and turns 87 in April. She was last hospitalized in 2003 for knee surgery.
Her husband, the 92-year-old Prince Philip, was hospitalized three times between December 2011 and August 2012 -- once for treatment of a blocked coronary artery and twice for a bladder infection.
Get the latest news from CNN.com
CNN's Richard Quest, Elizabeth Cohen, Per Nyberg and Max Foster contributed to this report.
Part of complete coverage on
March 15, 2014 -- Updated 0128 GMT (0928 HKT)
Here are answers to some of the most frequently asked questions about this baffling disappearance.
March 14, 2014 -- Updated 1146 GMT (1946 HKT)
The two pilots who were flying Malaysia Airlines Flight 370 may lead to a few clues in the investigation.
March 13, 2014 -- Updated 1534 GMT (2334 HKT)
As investigators search for Malaysia Airlines Flight 370, analysts try to figure out why the high-tech plane's transponders were disabled.
Track star Oscar Pistorius is accused of killing his girlfriend, Reeva Steenkamp. Follow live updates of South Africa's trial of the century.
March 14, 2014 -- Updated 0958 GMT (1758 HKT)
A CNN team joins international observers trying to get into Crimea from Ukraine -- here's what they saw.
March 13, 2014 -- Updated 1224 GMT (2024 HKT)
Watch how Pope Francis is redefining the papacy and breathing new life into the Catholic Church.
March 16, 2014 -- Updated 0321 GMT (1121 HKT)
Browse through images you don't always see on news reports from CNN teams around the world.
March 13, 2014 -- Updated 1545 GMT (2345 HKT)
Michael Oren: He says the question is whether a truce can prevent conflict from becoming conflagration.
The Fukushima nuclear disaster changed global attitudes towards nuclear power. Explore our interactive to find out how.
March 12, 2014 -- Updated 2029 GMT (0429 HKT)
You -- the person now reading this story -- can help experts solve the mystery of what happened to Malaysia Airlines Flight 370.
March 13, 2014 -- Updated 1051 GMT (1851 HKT)
Scientists around the world are investigating whether living cells can be used to print replacement organs and tissues.
March 13, 2014 -- Updated 1153 GMT (1953 HKT)
There are two Web clips featuring Beyonce that have been getting a lot of attention.
Today's five most popular stories