[Update of Behçet disease. A presentation of 2 cases in primary care].

Behçet's disease is an inflammatory multisystemic chronic disease that progresses by outbreaks. It is more common in Asia and countries in the eastern Mediterranean basin (Silk Route). In Spain the prevalence is between 5 and 10 cases per 100,000 inhabitants. It is a difficult disease to diagnose because of the multiple and varied clinical manifestations, and because there are not pathognomonic laboratory tests available. The delay in the diagnosis, which is frequent in countries of low prevalence like Spain, increases the morbidity and the mortality of patients with Behçtis disease.