CTICasesCongenital Left Main Coronary Artery Osteal Atresia
▶ Watch on YouTube — age-restricted, cannot embed here
Imaging findings
Gated cardiac CT demonstrates complete absence of the left main coronary artery ostium at the aortic root, with a blind-ending vessel and retrograde filling of the left coronary system from the right coronary artery via collaterals. Decades-prior catheter angiography confirmed the absence of a left main ostium in the setting of normal, disease-free distal coronary arteries.
Key takeaways
Congenital osteal atresia of the left main coronary artery is an extremely rare anomaly that is typically diagnosed in pediatric patients but can occasionally be discovered in older adults, who survive due to robust collateral circulation from the right coronary artery. This congenital condition must be differentiated from acquired atherosclerotic ostial occlusion, which is typically accompanied by extensive calcification and diffuse coronary disease.
AI-assisted summary — may contain errors. Verify against the source video. Learn more
More from this webinar
- Beta-Thalassemia with Extramedullary Hematopoiesis and Diffuse Marrow ExpansionMetabolic
- Anomalous High Origin of the Right Coronary Artery with Incidental Developing PneumoniaCongenital
- Pulmonary Hemorrhage Secondary to Acute Pulmonary Embolism presenting as Abdominal PainVascular
- Acute Exacerbation of Idiopathic Pulmonary Fibrosis Triggered by Minor TraumaILD
- Type A Intramural Hematoma with Focal Intimal TearVascular
- Aortic Rupture and Mediastinal Hematoma Decompressing into the Right LungVascular
- Pleural Extramedullary Hematopoiesis in MyelofibrosisMetabolic
- Mediastinal Gray Zone LymphomaNeoplastic
See all cases from October 30, 2015 →
Related Congenital cases
- Interrupted Aortic Arch, Type A with Aortopulmonary Window
- Interrupted Aortic Arch, Type B Variant with Aberrant Subclavian Arteries
- Apical Hypertrophic Cardiomyopathy with Apical Aneurysm
- Dual LAD Coronary Artery Anomaly
- Congenital Pulmonary Airway Malformation (CPAM) Mimicking Adenocarcinoma
- Bridging Bronchus with Azygos Fissure