Four cases of Behcet's disease with aortic and peripheral lower limb l
esions illustrated the characteristics of the disease: multifocal lesi
ons, false aneurysms suggesting infectious perforation and iterative f
alse aneurysm in 1 case. The symptoms of Behcet's disease must be look
ed for stubbornly. In the presence of any arterial abnormality of this
type, this cause must be seriously considered.