An inflammatory
aneurysm localized in the iliac artery is very rare.
Aneurysms of the common iliac artery have been reported sporadically, but there has been no report of internal iliac artery
aneurysm. The patient was a 64-year-old male presenting with left lower
abdominal pain and
fever. Abdominal computed tomography (CT) revealed an
aneurysm of 42 × 52 mm in the left internal iliac artery. The aneurysmal wall had thickened and mantle sign was positive. Since the
aneurysm was expected to adhere tightly to surrounding tissues, the risk of open surgery was judged to be high, and coil embolization of the
aneurysm and the peripheral branches of the internal iliac artery was performed. Postoperatively, the left lower
abdominal pain disappeared, and signs of
inflammation were mitigated. The
endovascular procedure was extremely effective for the treatment of this inflammatory iliac artery
aneurysm.