CTICasesTruncus Arteriosus (Type II) with Unilateral Left Pulmonary Artery Atherosclerosis
▶ Watch on YouTube — age-restricted, cannot embed here
Imaging findings
CT angiography reveals an uncorrected truncus arteriosus (likely type II given the separate, close-proximity origins of the pulmonary arteries) associated with a ventricular septal defect. There is marked asymmetric atherosclerotic calcification and in situ thrombus isolated to the left pulmonary artery, while the right pulmonary artery is larger, free of atherosclerosis, and stenotic at its origin. Prominent systemic-to-pulmonary collateral vessels are visible, predominantly involving the left lung.
Key takeaways
Severe stenosis at the origin of a branch pulmonary artery can protect that vascular bed from the high pressures and turbulent flow of a common truncus, preventing the development of severe pulmonary atherosclerosis that occurs in the unprotected, high-flow contralateral pulmonary artery.
AI-assisted summary — may contain errors. Verify against the source video. Learn more
More from this webinar
- Retained Taser BarbsArtifact
- Double Aortic Arch with Atretic Left Segment and Isolated Left Subclavian ArteryCongenital
- Tuberous Sclerosis Complex with Lymphangioleiomyomatosis (LAM) and Multifocal Micronodular Pneumocyte Hyperplasia (MMPH)Congenital
- Pulmonary Artery Pseudoaneurysm Secondary to Lung CancerVascular
- IgG4-Related Sclerosing DiseaseAutoimmune
- Mediastinal LiposarcomaNeoplastic
- Endobronchial Metastasis from Renal Cell CarcinomaNeoplastic
- Hybrid Lesion: Intralobar Pulmonary Sequestration and Congenital Pulmonary Airway Malformation (CPAM)Congenital
See all cases from December 12, 2014 →
Related Congenital cases
- Patent Ductus Arteriosus (PDA) and Necrotizing Enterocolitis (NEC)
- Large Cervico-Mediastinal Cyst
- Left Superior Vena Cava Draining to Left Atrium with Unroofed Coronary Sinus (Raghib Syndrome variant)
- Scimitar Syndrome Variant with Azygos Drainage and Systemic Arterial Supply
- Arrhythmogenic Right Ventricular Dysplasia (ARVD)
- Gorham-Stout Disease (Vanishing Bone Disease)