800px-behcets_disease

Behcets disease Oral Ulcer in a patient with the disease.
By Ahmet Altiner MD, Rajni Mandal MD – http://dermatology.cdlib.org/1611/articles/18_2009-10-20/2.jpg, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=17863021