Methods. We studied 100 (46 males, 54 females; mean age: 40 6 years) patients with FMF. Also 94 (15 males, 79 females; mean age: 41 7 years) patients with SLE and 103 (44 males, 59 females; mean age: 40 5 years) apparently healthy volunteers were included as the control groups. Subclinical atherosclerosis was assessed by investigating atherosclerotic plaques and measuring IMT from carotid and common femoral arteries using B-mode ultrasonography (USG). Traditional atherosclerotic risk factors were also assessed.