Marfan Syndrome and Stanford Type B Aortic Dissection: CT Angiography, MRI Findings, Treatment Decisions, and Long-Term Surveillance
A Case-Based Radiology Review of Acute Chest and Abdominal Pain in a Young Woman
Executive Answer
Stanford type B aortic dissection should be considered urgently when a patient with Marfan syndrome develops sudden chest or abdominal pain. In this case, CT showed an aortic dissection beginning just distal to the origin of the left subclavian artery, near the aortic isthmus, involving the proximal descending thoracic aorta and the origin of an aberrant right subclavian artery. The initial study identified no contrast extravasation. Follow-up CT one week later showed no significant interval change. MRI additionally demonstrated lumbosacral dural ectasia and posterior vertebral scalloping, supporting the multisystem imaging phenotype of Marfan syndrome. The central clinical lesson is that short-term imaging stability does not eliminate long-term aortic risk.
Why This Case Matters
Aortic dissection is a time-sensitive vascular emergency, but its presentation does not always follow the demographic pattern clinicians expect. Although acute aortic syndromes are often associated with older age and hypertension, inherited connective tissue disorders can predispose younger patients to serious aortic complications.
Marfan syndrome is particularly important because abnormalities involving the aortic wall may develop in early adulthood. Sudden chest pain accompanied by abdominal pain should therefore trigger prompt assessment for acute aortic disease rather than an initial assumption of musculoskeletal or gastrointestinal pathology.
This case also illustrates an important principle in diagnostic imaging: the value of a CT examination lies not only in identifying an intimal flap, but also in defining the full extent of the dissection, evaluating branch-vessel anatomy, assessing possible complications, and establishing a reliable baseline for subsequent surveillance.
The additional MRI findings demonstrate how vascular and spinal abnormalities can contribute to a broader understanding of a systemic connective tissue disorder.
1. Clinical Presentation and Diagnostic Reasoning
The patient was a woman in her twenties with established Marfan syndrome who presented with sudden chest and abdominal pain that had begun approximately one day earlier.
The initial CT examination demonstrated an aortic dissection beginning just distal to the left subclavian artery origin, near the aortic isthmus. The dissection involved the proximal descending thoracic aorta and the origin of an aberrant right subclavian artery. No contrast extravasation was observed.
A follow-up CT performed one week later showed no significant interval change in the dissection.
The clinical information does not establish the patient's initial hemodynamic status, exact aortic diameters, laboratory values, or definitive treatment. These details should not be inferred from the imaging findings alone.
Why age should not lower clinical suspicion
In a patient with known Marfan syndrome, the underlying connective tissue disorder materially changes the interpretation of acute pain. A young age does not provide reassurance when the patient has a recognized predisposition to aortic disease.
The initial assessment should address the onset and character of pain, radiation to the back or abdomen, syncope, dyspnea, neurologic symptoms, pulse asymmetry, and blood pressure differences between the arms. None of these findings, considered in isolation, is sufficiently reliable to exclude dissection.
Abdominal pain deserves particular attention. If a dissection extends into the abdominal aorta or compromises visceral branch vessels, the consequences may include intestinal ischemia, renal malperfusion, or lower-extremity ischemia. These complications were not established in the available case description, but they are important targets of the initial imaging assessment.
2. Why Marfan Syndrome Predisposes Patients to Aortic Dissection
Marfan syndrome is an inherited connective tissue disorder commonly associated with pathogenic variants in the FBN1 gene, which encodes fibrillin-1. Fibrillin-1 contributes to the organization and function of extracellular microfibrils in connective tissues.
Abnormalities in this structural system can affect the mechanical integrity and biological behavior of the aortic wall. Over time, aortic root enlargement, aneurysm formation, and dissection may occur.
An aortic dissection develops when blood enters or separates the layers of the aortic wall, creating a dissection plane. On CT angiography, an intimal flap may separate the true lumen from the false lumen. The appearance, extent, and relationship of these channels to branch vessels help determine the anatomical diagnosis and identify potential complications.
The clinical implications extend beyond the ascending aorta. Although aortic root and ascending aortic disease are major concerns in Marfan syndrome, the descending thoracic aorta remains clinically important. Previous proximal aortic surgery, if present, would not eliminate the need to evaluate the remaining aorta. No prior aortic surgery is documented in this case.
3. CT Angiography: Defining the Dissection and Its Complications
CT angiography (CTA) is central to the evaluation of suspected acute aortic dissection because it can demonstrate the dissection flap, define the longitudinal extent of disease, depict aortic branch anatomy, and identify findings that may indicate rupture or organ malperfusion.
The interpretation should be systematic rather than limited to the most conspicuous abnormality.
Key CT findings in this case
The dissection began immediately distal to the left subclavian artery origin, near the aortic isthmus, and involved the proximal descending thoracic aorta. The reported extent also included the origin of an aberrant right subclavian artery.
The initial examination showed no contrast extravasation. This is an important observation, but it should be interpreted narrowly: active contrast leakage was not demonstrated on that study. The absence of extravasation does not independently establish that the aortic wall is safe from future rupture or progression.
The case description does not provide reproducible aortic diameter measurements, a quantified true-lumen-to-false-lumen ratio, or detailed branch-vessel perfusion measurements. These should not be reconstructed from the written description.
A practical CT interpretation checklist
| Assessment | Key question | Clinical relevance |
|---|---|---|
| Dissection flap | Is an intimal flap separating the luminal channels visible? | Establishes the anatomical basis for dissection |
| Proximal extent | Is the ascending aorta involved? | Determines Stanford classification |
| Distal extent | Does the dissection extend into the abdominal aorta? | Defines the full disease burden |
| Branch vessels | Are major arch or visceral branches involved? | Identifies possible malperfusion |
| Aortic wall and surrounding tissues | Is there periaortic hematoma or another sign of bleeding? | Helps assess complications |
| Contrast extravasation | Is active leakage demonstrated? | Raises concern for active bleeding when present |
| Organ perfusion | Is there evidence of renal, intestinal, spinal, or limb ischemia? | Influences urgency and treatment planning |
| Aortic dimensions | What are the diameters at reproducible anatomical landmarks? | Establishes a baseline for surveillance |
A comprehensive examination should cover the clinically relevant extent of the aorta and its major branches. Protocol selection should reflect the suspected acute aortic syndrome, the patient's condition, and the need to assess branch-vessel perfusion.
Why the branch-vessel anatomy matters
An aberrant right subclavian artery is an anatomical variant of the aortic arch. Its origin and course can alter the spatial relationship between the aortic arch and its branches.
In this case, the reported involvement of its origin makes careful anatomical description especially important. The variant should not be misclassified as a defining feature of Marfan syndrome. Its relevance is primarily anatomical and procedural: clinicians need to understand the relationship between the dissection and the branch-vessel origin when considering surveillance or potential intervention.
Radiology principle: Describe the dissection relative to identifiable branch-vessel origins, not merely as an abnormality of the descending thoracic aorta.
4. Stanford Type B Classification: Why Ascending Aortic Involvement Matters
The Stanford system classifies aortic dissection according to whether the ascending aorta is involved.
Stanford type A: The ascending aorta is involved, regardless of where the dissection originated.
Stanford type B: The ascending aorta is not involved.
The dissection in this case is classified as Stanford type B because the reported findings describe a dissection centered on the descending thoracic aorta without ascending aortic involvement.
The classification is clinically important, but it is not a complete risk assessment. A type B dissection can still become life-threatening if it is complicated by rupture, organ malperfusion, persistent pain, uncontrolled hypertension, or progressive aortic enlargement.
A distinction should also be maintained between the Stanford classification and the DeBakey system, which describes the origin and distribution of the dissection. The available anatomical description supports the Stanford classification; a more specific DeBakey subtype should not be assigned without sufficient information about the complete extent of the lesion.
5. MRI Findings: Dural Ectasia and Posterior Vertebral Scalloping
MRI demonstrated dural ectasia involving the L3–S2 spinal segments, accompanied by posterior vertebral scalloping.
Dural ectasia refers to abnormal enlargement of the dural sac surrounding the spinal nerve roots and spinal cord. It is recognized in Marfan syndrome and other connective tissue disorders. Posterior vertebral scalloping may accompany chronic pressure-related remodeling of the vertebral bodies.
These findings are anatomically distinct from aortic dissection. Their importance lies in the additional evidence they provide about the patient's systemic connective tissue phenotype.
What MRI contributes
MRI can characterize the lumbosacral dura and adjacent osseous structures without ionizing radiation. In this case, the reported findings extend the imaging assessment beyond the cardiovascular system and reinforce the importance of considering Marfan syndrome as a multisystem disorder.
However, dural ectasia is not sufficient by itself to establish Marfan syndrome. Diagnosis depends on the appropriate clinical context, systemic features, family history, genetic assessment when indicated, and established diagnostic criteria.
Figure 1. MRI — Axial T2 TRUFI
Axial T2-weighted TRUFI imaging demonstrates the reported lumbosacral dural ectasia. The study should be interpreted together with the extent of dural enlargement and associated vertebral remodeling.
Figure 2. MRI — Axial T2 TRUFI
An additional axial T2 TRUFI image provides complementary anatomical assessment of the dural sac and posterior vertebral contours. Dural ectasia is a supportive imaging feature rather than an independent diagnostic confirmation of Marfan syndrome.
6. CT Interpretation
The following captions preserve the reported imaging sequence and can be placed directly alongside the corresponding source figures.
Figure 3. Initial CT — Sagittal Image
Radiologic interpretation: The sagittal CT image demonstrates aortic dissection beginning just distal to the left subclavian artery origin, near the aortic isthmus, and extending into the proximal descending thoracic aorta.
Clinical significance: The relationship to the left subclavian artery helps establish the proximal anatomy. Assessment of the ascending aorta remains essential for Stanford classification.
Figure 4. Initial CT — Sagittal Image
Radiologic interpretation: The sagittal contrast-enhanced CT image demonstrates the aortic arch and descending thoracic aorta. The arrow identifies an aberrant right subclavian artery, highlighting the patient's variant aortic arch anatomy.
Clinical significance: Accurate identification of an aberrant right subclavian artery is important for vascular anatomical assessment and treatment planning in patients with aortic disease. The relationship between this variant vessel and the aortic dissection should be evaluated using the complete CT angiographic dataset, including axial images and multiplanar reconstructions. This vascular variant alone is not diagnostic of Marfan syndrome.
Figure 5. Initial CT — Sagittal Image
Radiologic interpretation: The sagittal CT image demonstrates dural ectasia in the lumbosacral spine, accompanied by posterior vertebral scalloping at the L3–S2 levels. The expanded dural sac and associated remodeling of the posterior vertebral bodies are highlighted by the arrows and yellow outline.
Clinical significance: Dural ectasia is an important skeletal and spinal imaging feature associated with Marfan syndrome. Recognition of dural sac enlargement and posterior vertebral scalloping can support the assessment of connective tissue disorders in the appropriate clinical context. These findings should be interpreted alongside the patient's clinical features and other diagnostic criteria; they are not independently diagnostic of Marfan syndrome.
Figure 6. Follow-Up CT at One Week — Axial Arterial-Phase Image
Radiologic interpretation: The axial arterial-phase image is used to reassess the dissection and compare its appearance with the initial examination.
Clinical significance: The reported follow-up study showed no significant interval change. Comparison should consider aortic diameter, dissection extent, luminal configuration, branch-vessel involvement, and any new complication.
Figure 7. Follow-Up CT at One Week — Volume-Rendered 3D Image
Radiologic interpretation: Volume rendering provides a three-dimensional overview of the aorta and its branch-vessel relationships.
Clinical significance: Three-dimensional reconstruction can help clinicians understand vascular anatomy and discuss potential procedural approaches. It does not replace source-image review for subtle intimal flaps, wall abnormalities, or signs of rupture.
Figure 8. Follow-Up CT at One Week — Sagittal Maximum Intensity Projection
Radiologic interpretation: Sagittal maximum intensity projection (MIP) highlights contrast-opacified vascular structures and provides an overview of the longitudinal vascular anatomy.
Clinical significance: MIP is useful for assessing vessel continuity and branch origins, but the underlying images remain necessary for detailed evaluation of the aortic wall and dissection flap.
Figure 9. Follow-Up CT at One Week — Coronal Maximum Intensity Projection
Radiologic interpretation: Coronal MIP provides a complementary view of the aorta and its major branches.
Clinical significance: Multiplanar comparison supports assessment of the overall dissection distribution. Stability should be determined from the complete examination and clinical context rather than from a single reconstructed image.
7. Treatment Decisions: Uncomplicated Versus Complicated Type B Dissection
Treatment for acute Stanford type B aortic dissection depends on the patient's hemodynamic condition, the presence of complications, aortic anatomy, and the underlying disease.
For uncomplicated acute type B dissection, initial management generally includes close monitoring, pain control, and medical therapy directed at reducing aortic wall stress through individualized blood pressure and heart-rate management.
Intravenous beta-blockade is commonly used when appropriate. Additional antihypertensive therapy may be required depending on the clinical response. Treatment must preserve adequate organ perfusion; blood pressure reduction should not be pursued without regard to evidence of ischemia or hemodynamic compromise.
When intervention may be necessary
Complicated type B dissection may involve rupture or impending rupture, organ malperfusion, persistent or refractory pain, hypertension that remains uncontrolled despite appropriate treatment, or progressive aortic enlargement.
These findings warrant urgent evaluation by a multidisciplinary aortic team. Depending on the anatomy and clinical circumstances, treatment may involve an endovascular procedure, open surgery, or another individualized strategy.
Thoracic endovascular aortic repair (TEVAR) is an important option for selected patients with complicated type B dissection. However, Marfan syndrome changes the long-term considerations because the underlying aortic tissue is affected by a heritable connective tissue disorder. Endovascular repair may be appropriate in selected circumstances, but the durability of the repair and the condition of the remaining aorta require careful consideration.
Open surgical repair may be favored in particular situations. The choice cannot be made from the Stanford label alone.
Important case limitation: The available case description does not establish whether the patient received medical treatment alone, TEVAR, open surgery, or another intervention. No treatment should be attributed to this patient without further documentation.
8. Why One-Week Imaging Stability Is Not the End of Surveillance
The follow-up CT showed no significant interval change after one week. This is useful information because it indicates that the reported imaging appearance had not materially changed over that short interval.
It does not establish long-term stability.
Aortic dissection may evolve after an initially stable examination. Residual false-lumen flow, changes in aortic diameter, new branch-vessel compromise, or additional aortic pathology may influence subsequent management. The available case description does not provide enough information to characterize these features quantitatively.
Long-term surveillance should be individualized according to the extent of dissection, aortic dimensions, symptoms, treatment history, residual anatomy, and the patient's heritable aortic disease.
Repeated CT examinations provide detailed anatomical information but involve cumulative ionizing radiation exposure. In a young patient who may require lifelong imaging, MRI or magnetic resonance angiography can be useful alternatives when clinically appropriate and technically adequate. The choice of modality should reflect the clinical question, patient stability, accessibility, and need for detailed assessment.
Ongoing care also includes blood pressure management, adherence to prescribed medication, education about symptoms that require emergency assessment, and appropriate family evaluation and genetic counseling.
9. Differential Diagnosis of Acute Chest and Abdominal Pain
Although the clinical context strongly supports evaluation for acute aortic syndrome, the differential diagnosis of chest and abdominal pain remains broad.
| Differential diagnosis | Important imaging or clinical clues | Diagnostic consideration |
|---|---|---|
| Aortic dissection | Intimal flap and true and false lumens | Define the full extent and assess branch-vessel perfusion |
| Intramural hematoma | Crescentic or circumferential aortic wall thickening | Review noncontrast and contrast-enhanced CT when available |
| Penetrating atherosclerotic ulcer | Focal ulcer-like lesion in an atherosclerotic aorta | Consider vascular morphology and the clinical setting |
| Ruptured aortic aneurysm | Aortic dilatation, surrounding hematoma, or hemorrhage | Requires urgent assessment for bleeding and instability |
| Acute coronary syndrome | ECG changes, cardiac biomarkers, and relevant coronary findings | Symptoms may overlap with acute aortic disease |
| Pulmonary embolism | Pulmonary arterial filling defects and possible right-heart strain | Requires an appropriate imaging protocol and clinical assessment |
| Acute abdominal pathology | Findings such as bowel obstruction, inflammation, or ischemia | Evaluate for aortic extension and vascular causes of organ ischemia |
In a patient with known Marfan syndrome, acute aortic disease deserves priority in the initial diagnostic assessment. However, clinicians should avoid premature closure: another diagnosis may coexist, and abdominal pain may reflect a complication not fully characterized by the thoracic findings.
10. Diagnostic Risk: Where Important Findings Can Be Missed
The case highlights several system-level vulnerabilities in acute imaging workflows.
Anchoring on age: Younger patients may not fit the stereotypical profile of acute aortic disease. A known connective tissue disorder should remain prominent in the clinical history.
Incomplete anatomical coverage: Identifying a dissection in the descending thoracic aorta is not enough if the remaining aorta and clinically relevant branch vessels have not been assessed.
Satisfaction of search: Once the dissection is identified, the reader may devote less attention to branch-vessel involvement, organ perfusion, or additional complications.
Overinterpretation of negative findings: The absence of contrast extravasation should not be translated into a statement that rupture risk is absent.
Overreliance on reconstructed images: MIP and volume-rendered images clarify vascular anatomy but cannot substitute for source-image review.
Failure to compare prior studies: Reproducible measurements and direct comparison with earlier examinations are important for assessing change over time.
These risks are best addressed through a structured interpretation process, appropriate imaging protocols, explicit communication of urgent findings, and reliable follow-up systems—not by assigning blame to individual clinicians.
11. Can Artificial Intelligence Improve Aortic Dissection Detection?
AI has potential applications in acute aortic imaging, particularly in high-volume emergency settings where time-sensitive abnormalities must be recognized and communicated quickly.
Potential functions include image triage, detection support, segmentation of the aorta, measurement of aortic diameter, and assistance with longitudinal comparison. AI may also help direct attention to suspected abnormalities that require prompt radiologist review.
However, the present case does not document the use of an AI system. No AI detection result, sensitivity, specificity, clinical outcome, or performance comparison can be attributed to this patient.
Potential AI workflow
A hospital may evaluate an AI-assisted workflow in which CT images are transferred through the imaging infrastructure, analyzed by a validated model, and presented to the radiologist with a prioritized notification or visual annotation.
The purpose is to support timely review, not to replace the radiologist's interpretation.
| AI function | Potential value | Important limitation |
|---|---|---|
| Acute aortic abnormality detection | May help prioritize suspicious examinations | False negatives may delay recognition; false positives may increase workload |
| Aortic segmentation | May support reproducible anatomical assessment | Segmentation errors may occur with complex anatomy or poor image quality |
| Diameter measurement | May assist serial comparison | Measurement methods and anatomical landmarks must remain consistent |
| Branch-vessel analysis | May draw attention to potential involvement | Anatomical variants can complicate localization |
| Follow-up comparison | May support identification of interval change | Different protocols, contrast timing, and reconstruction methods can affect comparison |
What clinicians must verify?
Any AI-generated alert should be checked against the original images. The radiologist must verify the presence and extent of the dissection, ascending aortic involvement, branch-vessel anatomy, possible complications, and the adequacy of the examination.
Relevant failure modes include false-negative results, false-positive alerts, poor image quality, domain shift between institutions, underrepresentation of unusual anatomy in training datasets, and workflow interruptions. Automation bias is another concern: a negative AI result must not override strong clinical suspicion or a radiologist's direct findings.
Before deployment, a hospital should evaluate the system on representative local data, define escalation procedures, monitor performance, and determine how results are integrated into the clinical workflow. Regulatory status and intended use must be verified for any specific product; they cannot be assumed from a general description of AI capability.
12. Healthcare Workflow and Economic Implications
The principal operational objective in suspected acute aortic disease is timely, accurate diagnosis followed by appropriate clinical communication and management.
Delayed recognition can increase the risk of complications and may lead to additional examinations, more complex treatment, prolonged hospitalization, or greater resource utilization. These are potential system-level consequences; no specific cost savings or financial loss can be calculated from the information available in this case.
An AI implementation should therefore be evaluated on more than detection accuracy alone. Relevant measures include time to radiologist review, time to communication of critical findings, false-alert burden, impact on workload, integration costs, ongoing maintenance, and clinician adoption.
A system that produces frequent false positives may increase interruptions and reduce the benefit of prioritization. A tool that is technically accurate but poorly integrated into the PACS, reporting system, and emergency workflow may also fail to improve care.
The appropriate economic question is not whether AI can be purchased, but whether a validated and well-integrated system produces measurable clinical or operational value at an acceptable total cost of ownership.
13. Practical Radiology Pearls
Marfan syndrome changes the pretest probability. Sudden chest or abdominal pain in a young patient with a known heritable aortic disorder warrants urgent assessment for acute aortic disease.
Stanford classification depends on ascending aortic involvement. The location of the initial tear alone is not a substitute for evaluating the ascending aorta.
Document the relationship to arch branches. In this case, the origin of an aberrant right subclavian artery is relevant to the anatomical description.
Assess complications systematically. Evaluate possible rupture, branch-vessel compromise, and organ malperfusion rather than stopping at identification of the intimal flap.
Interpret negative findings precisely. No contrast extravasation on the initial CT means that active leakage was not demonstrated; it does not prove long-term safety.
Use source images to verify reconstructions. MIP and volume rendering are useful for anatomical overview but do not replace axial and multiplanar review.
Recognize the systemic phenotype. Lumbosacral dural ectasia and posterior vertebral scalloping provide additional context for the connective tissue disorder.
Do not infer treatment from imaging alone. The documented one-week stability does not establish whether the patient received medical therapy, endovascular repair, or surgery.
Plan for long-term surveillance. A stable early follow-up examination does not eliminate the need for ongoing aortic assessment.
Keep AI advisory. Automated detection can support prioritization, but the final diagnosis and assessment of complications require clinical and radiologic verification.
14. Frequently Asked Questions
What is the key CT finding in this case?
The key finding is an aortic dissection beginning just distal to the left subclavian artery origin, near the aortic isthmus, with involvement of the proximal descending thoracic aorta and the origin of an aberrant right subclavian artery.
Why is this classified as Stanford type B?
Stanford type B dissection does not involve the ascending aorta. The classification depends on the anatomical extent of disease, not simply on the location of the initial tear.
Does the absence of contrast extravasation exclude rupture?
No. It indicates that contrast leakage was not demonstrated on the initial examination. The finding must be interpreted with the complete CT appearance, hemodynamic status, and clinical assessment.
What does dural ectasia mean in a patient with Marfan syndrome?
Dural ectasia is abnormal enlargement of the dural sac and can be associated with connective tissue disorders such as Marfan syndrome. It is a supportive imaging finding, not a stand-alone diagnostic test.
Does an aberrant right subclavian artery establish a diagnosis of Marfan syndrome?
No. It is an anatomical variant of the aortic arch. Its relevance in this case is the relationship between its origin and the dissection.
Is every Stanford type B dissection treated with TEVAR?
No. Treatment depends on whether the dissection is complicated, the patient's clinical condition, the aortic anatomy, and the underlying disease. TEVAR is an important option for selected patients, but it is not universally appropriate.
Why is follow-up necessary if the one-week CT is stable?
Short-term stability does not guarantee long-term stability. Continued assessment may be needed to detect changes in aortic diameter, dissection extent, branch-vessel perfusion, or other complications.
Can AI diagnose aortic dissection independently?
AI may assist with detection, prioritization, segmentation, or measurement, but its output requires verification. Performance limitations, false negatives, false positives, and unusual anatomy must be considered.
Quiz
Question 1. A patient with Marfan syndrome has a dissection beginning distal to the left subclavian artery, with no ascending aortic involvement. Which Stanford classification applies?
A. Type A
B. Type B
C. DeBakey type II
D. Intramural hematoma
Correct answer: B. Type B. The Stanford classification is based on ascending aortic involvement.
Question 2. What is the most appropriate interpretation of lumbosacral dural ectasia in this case?
A. It independently confirms Marfan syndrome.
B. It is the same anatomical lesion as the aortic dissection.
C. It is a supportive finding associated with a systemic connective tissue disorder.
D. It establishes that the aberrant right subclavian artery is hereditary.
Correct answer: C. Dural ectasia contributes to the systemic imaging phenotype but must be interpreted in clinical context.
Question 3. A patient with type B dissection develops persistent pain despite appropriate medical management and suspected organ malperfusion. What is the most appropriate next step?
A. Continue medical therapy without reassessment.
B. Stop imaging because no contrast extravasation was previously seen.
C. Obtain urgent multidisciplinary evaluation for complications and possible intervention.
D. Perform TEVAR in every case without further anatomical assessment.
Correct answer: C. Persistent pain and suspected malperfusion require urgent assessment for complicated dissection and individualized consideration of intervention.
Conclusion: Aortic Dissection Requires Anatomical and Systemic Interpretation
This case of Marfan syndrome with Stanford type B aortic dissection illustrates the importance of integrating clinical risk, cross-sectional imaging, vascular anatomy, and long-term surveillance.
CT angiography identified a dissection beginning distal to the left subclavian artery origin and involving the proximal descending thoracic aorta and the origin of an aberrant right subclavian artery. No contrast extravasation was observed initially, and follow-up CT at one week showed no significant interval change. MRI demonstrated lumbosacral dural ectasia and posterior vertebral scalloping, adding evidence of the patient's multisystem connective tissue phenotype.
The most important lesson is that a technically accurate diagnosis must go beyond naming the dissection. Radiologists and treating clinicians need to define its extent, assess complications, characterize branch-vessel anatomy, and communicate findings that may change management. Early imaging stability should not be confused with long-term safety.
AI may eventually support detection and workflow prioritization in acute aortic imaging, but its contribution must be demonstrated through appropriate validation and safe clinical integration. The responsibility for interpreting the complete examination and correlating it with the patient's condition remains with the clinical team.
Author's Research Perspective
In my view, the diagnostic value of aortic imaging is greatest when the visible vascular abnormality is interpreted within the patient's broader clinical and anatomical context. Identifying the intimal flap is essential, but understanding its extent, its relationship to branch vessels, the possibility of organ malperfusion, and the wider phenotype of an inherited connective tissue disorder is what makes the interpretation clinically actionable.
Medical Disclaimer
This article is intended for medical education and professional information. It does not replace individualized medical evaluation, diagnosis, or treatment. Suspected acute aortic dissection is a medical emergency requiring immediate assessment by qualified clinicians.
References
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Mazzolai L, Teixido-Tura G, Lanzi S, et al. 2024 ESC Guidelines for the management of peripheral arterial and aortic diseases. European Heart Journal. 2024;45(36):3538–3700. https://doi.org/10.1093/eurheartj/ehae179
Loeys BL, Dietz HC, Braverman AC, et al. The revised Ghent nosology for Marfan syndrome. Journal of Medical Genetics. 2010;47(7):476–485. https://doi.org/10.1136/jmg.2009.072785
Erbel R, Aboyans V, Boileau C, et al. 2014 ESC Guidelines on the diagnosis and treatment of aortic diseases. European Heart Journal. 2014;35(41):2873–2926. https://doi.org/10.1093/eurheartj/ehu281
Elefteriades JA. Natural history of thoracic aortic aneurysms: Indications for surgery, and surgical versus nonsurgical risks. The Annals of Thoracic Surgery. 2002;74(5)–S1880. https://doi.org/10.1016/S0003-4975(02)04147-4
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