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Research ArticleSpine

The Dominant Anterior Thoracic Artery of the Spinal Cord

J.E. Small and V.H. Pérez Pérez
American Journal of Neuroradiology January 2023, 44 (1) 111-114; DOI: https://doi.org/10.3174/ajnr.A7737
J.E. Small
aFrom Lahey Hospital and Medical Center (J.E.S.), Burlington, Massachusetts
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V.H. Pérez Pérez
bInstituto de Ciencias Forenses (V.H.P.P), TSJ Ciudad de México, Centro Medico Siglo XXI, Mexico City, Mexico
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Abstract

BACKGROUND AND PURPOSE: Dominant radiculomedullary arteries such as the artery of lumbar enlargement and the artery of cervical enlargement are well-documented. However, variability exists as to the size, number, and location of other radiculomedullary arteries contributing supply to the anterior spinal artery. The aim of this anatomic study was to document the prevalence and characteristics of the dominant anterior thoracic artery in cadaveric specimens.

MATERIALS AND METHODS: Microsurgical dissection of cadaveric human spinal cord specimens (n = 50) was conducted. The artery of lumbar enlargement was injected with colored latex until the small-caliber arterial vessels were filled. The dominant anterior thoracic artery was identified, injected, and filled with diluted industrial paint. The course, diameter, and location of the dominant anterior thoracic artery, artery of lumbar enlargement, and artery of cervical enlargement were documented.

RESULTS: The artery of lumbar enlargement was identified between T3 and L2 in all 50 specimens (100%), and the artery of cervical enlargement was identified in 84% of specimens (42/50). At least 1 dominant anterior thoracic artery distinct from the artery of lumbar enlargement and the artery of cervical enlargement was identified between T1 and T11 in 47 of the 50 specimens (94%). The most frequent origin of the dominant anterior thoracic artery was at the level of T4 on the left. The average size of the dominant anterior thoracic artery was 0.446 mm (range, 0.300–0.759 mm on the left and 0.270–0.569 mm on the right).

CONCLUSIONS: A dominant anterior thoracic artery is present in 94% of individuals. Variations of the arterial supply to the anterior thoracic cord are of great importance due to their implications for ischemic events as well as surgical and endovascular procedures.

ABBREVIATIONS:

ACE
artery of cervical enlargement
ALE
artery of lumbar enlargement
ASA
anterior spinal artery
DATA
dominant anterior thoracic artery
RMA
radiculomedullary artery
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American Journal of Neuroradiology: 44 (1)
American Journal of Neuroradiology
Vol. 44, Issue 1
1 Jan 2023
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The Dominant Anterior Thoracic Artery of the Spinal Cord
J.E. Small, V.H. Pérez Pérez
American Journal of Neuroradiology Jan 2023, 44 (1) 111-114; DOI: 10.3174/ajnr.A7737

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The Dominant Anterior Thoracic Artery of the Spinal Cord
J.E. Small, V.H. Pérez Pérez
American Journal of Neuroradiology Jan 2023, 44 (1) 111-114; DOI: 10.3174/ajnr.A7737
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