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Dynamic single-section computed tomography scan revealed a large hematoma in the right psoas muscle, probably caused by the endoscopic discectomy. Computed tomography image 15 seconds after intravenous injection of contrast (arterial phase) showed leakage of contrast media into the hematoma directly, implying active arterial bleeding (black arrow). long arrow: both common iliac arteries bifurcate from the aorta; delta arrow: common iliac vein.
