Illustrated Encyclopedia of Human Anatomic Variation: Opus II: Cardiovascular System
Ronald A. Bergman, PhD
Adel K. Afifi, MD, MS
Ryosuke Miyauchi, MD
Peer Review Status: Internally Peer Reviewed
This study was based on 775 laboratory specimens.
A: Branch of the thyrocervical trunk derived from the first portion of the subclavian artery; 622 of 775 specimens, 80.25%; 301 right, 321 left.
B: Separate and distinct branch from first portion of subclavian artery; 125 of 775 specimens, 16.12%; 74 right, 51 left.
C: Common trunk with internal thoracic artery; 9 of 775 specimens, 1.16%; 5 right, 4 left.
D: Common trunk vertebral artery; 5 of 775 specimens, 0.64%; 4 right, 1 left.
E: Direct branch of common carotid artery; 4 of 775 specimens, 0.52%; all on right side.
F: Vessel of thyroidea ima type, arising at bifurcation of innominate artery on the right, and from the aortic arch between the left common carotid and subclavian arteries on the left; 4 of 775 specimens, 0.52%; 2 right, 2 left.
G: Common trunk with transverse scapular artery derived in turn from third part of subclavian artery; 3 of 775 specimens, 0.39%; 2 right, 1 left.
H: Separate and distinct branch from third portion of subclavian artery; 1 of 775 specimens, 0.13%; right side.
I: Common trunk with costocervical trunk derived in turn from second portion of subclavian artery; 1 of 775 specimens, 0.13%; right side.
Redrawn from Daseler, E.H. and B.J. Anson. Surgical anatomy of the subclavian artery and its branches. Surg. Gynecol. Obstet. 108:149174, 1959.
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