Illustrated Encyclopedia of Human Anatomic Variation: Opus II: Cardiovascular System: Arteries
Ronald A. Bergman, PhD
Adel K. Afifi, MD, MS
Ryosuke Miyauchi, MD
Peer Review Status: Internally Peer Reviewed
An isolated dorsospinal artery has been found to supply the anterior spinal artery in only two cases. In one of the cases, the anterior spinal artery had a dual blood supply. A recent angiographic study by Lefournier, et al. of patients undergoing spinal cord vascularization at the thoracolumbar level demonstrated a dual blood supply for the anterior spinal artery in 48% of patients studied, the lowest of the two supplying only the conus medullaris. A single supply was noted in 45% of patients, and three anterior radiculospinal arteries supplied the cord in 7% of patients studied. In one case, both radiculospinal arteries supplied the conus medullaris.
The anatomic variant arises when the anastomosis of segmental arteries occurs some distance from the spine; the persistence of the initial portion of the primitive segmental trunk giving rise to a sole dorsospinal artery, directly from the aorta.
Bert S., Iyriboz A.T., Barret F. Zouaoui A.and J. Chiras (1995). Angiographic study of spinal cord vascularization at the thoraco-lumbar level. J Neuroradiol; 22: 12-19.
Chiras J.and Merland J.J. (1979) The dorsospinal artery, a little known anatomical variant: its importance in spinal angiography. J. Neuroradiol; 6:93-100.
Clavier E., Guimaraems L., Chiras J., Merland J.J. and J. Vasquez (1987). Isolated dorsospinal artery supplying anterior spinal artery. Neuroradiology 1987:29:213.
Lefournier, V., Bessou, P., Gailloud, P., Vasdev, A., Rüfenacht, D., and K. Boubagra. (1998) Direct emergence of the dorsospinal artery from the aorta supplying the anterior spinal artery: Report of two cases. AJNR Am. J. Neuroradiol. 19:1961-1962.
Thron AK. (1988) Clinical applications. In: Vascular Anatomy of the Spinal Cord. Wien: Springer. : 65,70.
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