• In 1996 Nitecki et al.  presented a series of 29 consecutive patients with an inflammatory aneurysm, who were matched in a case-control fashion to a group of 58 patients with noninflammatory aneurysms.
• The two groups had comparable characteristics of age, gender and cardiovascular risk factors.
• Patients with inflammatory aneurysms were significantly more symptomatic than those with noninflammatory aneurysms (93% vs. 9%, P<0.001), were more likely to have a family history of aneurysms (17% vs. 1.5%, P=0.007) and tended to be current smokers (45% vs. 24%, P=0.049).
• An elevated erythrocyte sedimentation rate was documented in 89% of the inflammatory series, compared with only 11% in the noninflammatory series (P<0.00001).
• In addition, inflammatory aneurysms were significantly larger than noninflammatory aneurysms at presentation (6.8 cm vs. 5.9 cm, P<0.05).
• The same findings were reported in a second case-control study, presented by Bonamigo et al. .
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