Aorto-iliac aneurysm infected by Brucella : distinctive presentation patterns of a rare entity

Abstract

There is currently a lack of information on presentation patterns and the appropriate investigation and treatment of aortic brucellosis. Herein a case affecting the iliac component of an aorto-iliac aneurysm, managed successfully with in situ graft repair, is reported. A review of the literature identified 25 cases, with the infrarenal abdominal aorta (65%) followed by the ascending thoracic aorta (23%) being mostly affected; only our case involved the iliacs. Aortic brucellosis affected mostly older men, caused pain more often than fever (in 73% and 57%, respectively), and involved frequently the spine or the aortic valve (n = 14, 56%). Preoperative diagnosis was made more often in the presence of fever (67% versus 18% in afebrile patients, P = 0.021). In situ aneurysm repair in the form of open (54%) or endovascular (8%) grafting was mostly performed. Mortality was 12% and graft infection was 13% at two years. In conclusion, aortic brucellosis has unique presentation patterns, usually affecting an abnormal or aneurysmal aorta and/or due to a contiguous spinal or aortic valve infection. Acute symptomatology with pain and/or fever occurs very often and should raise suspicion for aortic infection. Despite the seriousness of aortic involvement, mortality and reinfection rates are within acceptable levels.