Six cases of arterial aneurysms, due to ''Behcet's disease'' located i
n various arteries are presented. Surgical reconstruction included: Re
section of the lesions and replacement with corresponding grafts with
satisfactory results. In spite of the macroscopic similarity of the an
eurysms found in ''Behcet's disease'' as compared to those of mycotic
origin, the presence of any microorganism could not be detected in var
ious cultures or pathological specimens. Meticulous diagnosis on the n
ature of the aneurysm, close follow-up and careful postoperative antic
oagulant treatment, is imperative for satisfactory immediate and late
results.