CTICasesAzygos Fissure Variant with Superior Intercostal Vein
[...]. Azygos Fissure Variant with Superior Intercostal Vein. CTICases. Published February 18, 2017. https://str-case-explorer.pages.dev/c/mymze
Imaging findings
Chest CT shows a typical-appearing azygos fissure in the right upper lobe. However, the normal azygos vein arch is absent, and the fissure is instead occupied by an anomalous right superior intercostal vein that courses vertically to drain directly into the systemic venous system.
Key takeaways
This is a rare anatomic variant of the classic azygos lobe and fissure where the pleural fold invaginates around a superior intercostal vein rather than the azygos vein itself. Recognizing this variation prevents it from being misidentified as pathology, a mediastinal mass, or lymphadenopathy.
AI-assisted summary — may contain errors. Verify against the source video. Learn more
More from this webinar
- Duchenne Muscular Dystrophy CardiomyopathyCardiomyopathy
- Cardiac Amyloidosis with Left Atrial DominanceCardiomyopathy
- Eosinophilic Granulomatosis with PolyangiitisAutoimmune
- Tendyne Transcatheter Mitral Valve ReplacementValvular
- Iatrogenic Brachiocephalic Artery to Innominate Vein FistulaAorta & Arteries
- Unicuspid Aortic ValveValvular
- Fontan Palliation Progression for Tricuspid AtresiaCongenital
- Pulmonary Arteriovenous Malformation with Systemic Collateral SupplyCongenital
See all cases from February 18, 2017 →