Fig. 1. Schematic representation of normal roots of origin of azygos vein (AV). (A) Origin only by lateral root. (B) Origin by lateral and intermediate root. (C) Origin by lateral and medial root. RBCV, right brachiocephalic vein; LBCV, left brachiocephalic vein; SVC, superior vena cava; AHAV, accessory hemiazygos vein; HAV, hemiazygos vein; LRA, lateral root of AV; RSCV, right sub costal vein; RALV, right ascending lumbar vein; RK, right kidney; IVC, inferior vena cava; LK, left kidney; IRA, intermediate root of AV; MRA, medial root of AV.

Anat Cell Biol 2023;56:448~455 https://doi.org/10.5115/acb.23.074

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