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CASE REPORTrnA 20-year-old man was admitted for blunt trauma to left lower abdomen and dysfunction of left lower limb for 8 h. Physical examination: skin contusion for 5 cm in diameter at the left iliac fossa, accompanied with subcutaneous extravasated blood, tendess and rebound tendess of left lower quadrant, no abnormality of rectum palpated by digital examination. The left lower limb was pale, paresthesia, paralysis and low skin temperature, but no pitting edema. The pulsation of the left femoral artery and dorsalis pedis artery could not be palpated. Color Doppler imaging showed no flow in lumen of the upper portion of the left extal iliac artery for 5-6 cm in length. The diagnosis,was traumatic arterial occlusion of the left extal iliac artery. Laparotomy was performed. Haematoma in left lower abdominal wall and retroperitoneum, partial sever of extal and intal oblique muscle were found. Dissection of the common iliac artery, extal and intal iliac artery showed normal pulsation of