Figure 27a. CT-angiographic correlation for detection of bleeding from the iliolumbar artery. (a) CT scan shows extravasation of contrast material (open arrow) within a hematoma of the left iliacus muscle (solid arrows). (b) Angiogram shows multifocal extravasation (solid arrows) from the left iliolumbar artery (open arrows). Bleeding from the lateral sacral artery is also seen.