CTICasesType B Aortic Dissection with Patent False Lumen
Imaging findings
Contrast-enhanced CT demonstrates a communicating type B aortic dissection extending into the abdomen with a patent false lumen and true/false lumen separation. There is a projection mimicking a penetrating atherosclerotic ulcer (PAU), but it is located within the dissection flap and is non-hyperattenuating, consistent with chronic dissection changes rather than an acute PAU.
Key takeaways
Assessing acute aortic syndromes on contrast-enhanced CT without a non-contrast scan is challenging, as thrombus or slow flow in a false lumen can be misdiagnosed as an acute intramural hematoma (IMH) or penetrating ulcer. Aortic projections within a chronic dissection template often represent localized communicating false-lumen pouches rather than new penetrating ulcers.
AI-assisted summary — may contain errors. Verify against the source video. Learn more
More from this webinar
- Dabbing-Associated Acute Lung InjuryExposure
- CPR-Related Thoracic InjuriesTrauma
- Metastatic Malignant Uterine PEComaNeoplastic
- CellCept-Induced Pneumatosis IntestinalisIatrogenic
- Exogenous Lipoid PneumoniaExposure
- Retroperitoneal Fibrosis and Pulmonary Fibrosis (IgG4-Related Disease)Autoimmune
- Displaced and Crumpled Aortic StentIatrogenic
- Aneurysm and Dissection post Aortic Coarctation RepairIatrogenic
See all cases from April 15, 2021 →
Related Vascular cases
- Giant Ascending Aortic Aneurysm and Chronic Type A Dissection
- Pulmonary Arterial Hypertension associated with Neurofibromatosis Type 1
- Chronic Thromboembolic Pulmonary Hypertension (CTEPH) with Pulmonary Artery Compression of Left Coronary Artery
- Severe CTEPH in a Young Adult with Systemic-to-Pulmonary Collaterals
- Concurrent Venous, Pulmonary Arterial, and Aortic Thrombus (Hypercoagulable State)
- Type A Aortic Intramural Hematoma Misdiagnosed as Aortitis