Complex aphthosis.

Clearly, complex aphthosis alone does not constitute BD. Furthermore, the patient with complex aphthosis should be evaluated for associated conditions or diseases, some of which are "correctable causes" of RAS. The oral lesions of BD are aphthous in nature and are best classified as complex aphthosis. While some patients with complex aphthosis will develop BD, some will remain as sufferers of complex aphthosis for years until a cause is identified or the disease enters a spontaneous or therapeutically induced remission. Complex aphthosis is the major pseudo-Behçet's disease encountered in a referral practice.