CTICasesVariant Coronary Artery in the Ligament of Marshall
▶ Watch on YouTube — age-restricted, cannot embed here
Imaging findings
A coronary CT showed an unusual small vessel passing through the ligament of Marshall, which normally consists of an oblique vein that typically regresses during development. This vessel arose from the posterolateral branch or distal right coronary artery in a right dominant circulation and traveled up toward the sinoatrial node. Normally, an artery is not seen in this location unless it is a persistent left SVC.
Key takeaways
This is a peculiar and previously unseen coronary variant where an artery is present in the ligament of Marshall, an area usually empty unless a left superior vena cava is present. The sinoatrial node artery typically originates from the right or left coronary artery, almost 50/50, but not usually so distally or traveling in this retrograde fashion through the ligament of Marshall. This finding was a curiosity given a recent discussion about left atrial anatomy and the oblique vein of Marshall.
AI-assisted summary — may contain errors. Verify against the source video. Learn more
More from this webinar
- Fat Embolism SyndromeTrauma
- Dystrophic Calcification from Rhabdomyolysis and Pulmonary Interstitial EmphysemaMetabolic
- Nocardiosis in a Heart Transplant PatientInfection
- Pleuroparenchymal Fibroelastosis as a Manifestation of Graft-versus-Host DiseaseILD
- Synchronous Lung Cancer and Pulmonary HamartomaNeoplastic
- Job's Syndrome (Hyper-IgE Syndrome) with Chronic Staphylococcal InfectionsAutoimmune
- Squamous Cell Carcinoma Obstructing Bronchus IntermediusNeoplastic
- Metastatic Breast Cancer Mimicking Primary Lung CancerNeoplastic
See all cases from March 4, 2016 →