Ruptured aneurysm of the left common iliac artery
60 year old man with sudden onset abdominal pain, hypotension and tachycardia.
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Contrast enhanced 4-slice CT scan of the whole aorta (only the abdominal slices are shown) in the arterial phase and subsequent scan of the abdomen 2 min. post administration of i.v. contrast.
The main finding of the arterial phase is a ruptured aneurysm of the left common iliac artery which extension into the external iliac artery. It has a maximum diameter of 10 cm and extends over a length of 14 cm. Active extravasation of contrast enhanced blood can be seen into the large retroperitoneal haematoma.
The subsequent scan reveals massive continuing bleeding and with a notable increase of the size of theretroperitoneal hematoma which now also involves the contralateral retroperitoneum and measures about 20 x 10 x 26 cm.
This case demonstrates typical appearances of massive retroperitoneal haemorrhage from an uncommon cause: an isolated common iliac artery aneurysm - most patients would also have an abdominal aortic aneurysm.
The patient underwent emergent surgical intervention with successful replacement of the iliac artery, and eventual recovery. Most patients with ruptured aneurysms would not be so lucky.