Ischemic spinal cord injury is the major risk of bronchial artery embolization. The spinal artery may be overlooked on initial intercostobronchial trunk arteriography, as a result of reverse flow within the intercostal branch. Its identification, conversely, is easier on postembolization angiography. An illustrative case is presented, with angiographic correlation. The pathophysiology of the reverse flow is discussed. Technical recommendations are proposed for its detection.
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