Behcet's disease is a systemic vasculitis of unknown aetiology characterist
ically affecting venules. Onset is typically in young adults with recurrent
oral and genital ulceration, uveitis, skin manifestations, arthritis, neur
ological involvement, and a tendency to thrombosis. It has a world-wide dis
tribution but is prevalent in Japan, the Middle East, and some Mediterranea
n countries. International diagnostic criteria have been proposed, however
diagnosis can be problematical, particularly if the typical ulcers are not
obvious at presentation. Treatment is challenging, must be tailored to the
pattern of organ involvement for each patient and often requires combinatio
n therapies.