Multiple and Multidirectional Fissure Bleedings in a Patient With a Spontaneous Isolated Dissection of the Iliac Artery.

A 63-year-old man with a history of hypertension and dyslipidemia on medication was found to have an enlargement of an asymptomatic iliac artery aneurysm with an ulcer-like projection on computed tomography angiography. The longer and shorter diameter of the right iliac was increased from 24.0 × 18.1 mm to 38.9 × 32.1 mm over four years. Preoperative non-obstructive general angiography revealed multiple, multidirectional fissure bleedings. Fissure bleedings were found where computed tomography angiography appeared normal at the aortic arch. He was diagnosed with spontaneous isolated dissection of the iliac artery and was treated successfully with endovascular treatment.