Maybe you have heard till now about the Behcet's Disease. It is a rare disease and it is so hard to be diagnosed by clinicians. Mr. Hawar Abulrazaq discussed the Behcet's Disease today in a seminar. The following link will give you more detail information on Behcet's Disease.
http://www.behcets.com/site/c.8oIJJRPsGcISF/b.9196317/k.904C/Behcets_Disease.htm