True Saccular Aneurysm at the Iliac Bifurcation in an Adolescent: Case Report and Review of Lower Limb Vascular Embryology.

Introduction: Isolated iliac artery aneurysms are an uncommon occurrence in the absence of concurrent aortic disease in the adult population and are a rare entity in children and adolescents. Paediatric patients may present with false aneurysms less frequently but true aneurysms are exceptional. In this report, the case of an iliac bifurcation true saccular aneurysm is described.

Report: An 18 year old woman without history of infection, trauma, connective tissue disorders, or vasculitis, was referred with an incidental left iliac bifurcation saccular aneurysm. She underwent open surgical resection of the aneurysm with primary re-anastomosis of the common to external iliac arteries and ligation of the internal iliac artery. Histopathological assessment did not show any inflammatory or other underlying disease process.

Discussion: A case is presented of an isolated iliac bifurcation true aneurysm in an adolescent and its successful treatment. It is plausible that incomplete involution of the embryologically dominant sciatic artery may have been the cause for this presentation and for other congenital iliac artery aneurysms. Literature review of other paediatric iliac aneurysms shows an array of postulated underlying causes and treatment strategies.