Approximately 500 - 600 people in the word have Joubert Syndrome.
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3500
1 in every 5,00o to 7,000 people have Marfan syndrome.
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Many skating awards have been won by Brian Joubert, including the 2007 World Championship, and the European Championship titles in 2004, 2007 and 2009. Brian Joubert is also a six-time World medalist, and ten-time European medalist.
There are approximately7,222,222 people with down syndrome in the world ( if you compare the stat 1 in every 800-1000 births to the world's population of 6.5 billion).
They estimate that about 200,000 Americans have a severe form of Tourette Syndrome. About 1 in 100 children show mild symptoms.
Approximately 6.4 Million PeopleThe world population in 2004 was 6.4 billion people. As the Down syndrome rate is about 1 per 1000 births, this gives us an estimate of 6.4 million people who had Down syndrome in 2004. As Down syndrome people have a lower life expectancy than other people, this may be a slightly high estimate.(Please see the related links for sources.)
People, mostly males, has barth syndrome. Barth Syndrome affected 200,000 male infants.
Less then a few hundred people on earth at a time have morquio syndrome.
You may be thinking of the Dorothy Lack syndrome which many people call the White Coat Syndrome.