PMC10421584_01
Azygos and hemiazygos system hypertrophy.
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In computed angiotomography (AngioCT) we observe IVC agenesis with large collateral circulation in lumbar and hemorrhoidal plexus, as well as azygos and hemiazygos system hypertrophy (Figure 1 and Figure 2).
(White arrows) Azygos and hemiazygos system hypertrophy; (black arrows) thrombosed iliac veins.
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In computed angiotomography (AngioCT) we observe IVC agenesis with large collateral circulation in lumbar and hemorrhoidal plexus, as well as azygos and hemiazygos system hypertrophy (Figure 1 and Figure 2).
PMC10421584_02
(A) Left iliac vein ascending along the back of the psoas; (B) hypoplastic left renal vein; (C) varicose veins connecting with the superficial femoral vein at the right groin.
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This Angio-CT shows infrarenal IVC agenesis with common iliac veins running through different routes: on the right side adjacent to the aorta and on the left side ascending along the back of the psoas with a paravertebral course and final drainage into the azygos and hemiazygos system; varicose veins are also observed connecting with the right femoral vein (Figure 3).