Abstract: Background: Our purpose was to show different aspects of the muco-cutaneous lesions of Behcet’s disease (BD). Although they are not specific, they constitute the major symptoms in all sets of diagnosis criteria for BD. Methods: Description of muco-cutaneous lesions seen during 12 years follow up in 4605 patients. Results: 1- Mucous-membrane lesions: Recurrent oral aphthosis (OA) is the most important and frequent lesion of BD. It resembles the other OA of other ...