Descending Thoracic Aortic Aneurysm
Understanding Descending Thoracic Aortic Aneurysm found on Chest Computed Tomography imaging. Learn what this finding means and what steps to take next.
Radiographic Appearance
Computed Tomography FindingDilated descending thoracic aorta >3.5 cm with mural thrombus or calcification; best seen on CTA.
Clinical Significance
Risk of rupture/dissection rises with size; requires surveillance or repair.
What is a Thoracic Aortic Aneurysm?
Abnormal dilation of the aortic wall. CT angiography measures diameter and detects complications.
Imaging Appearance
- Fusiform or saccular dilation ＞3.5 cm
- Intimal calcifications displaced outward
- Mural thrombus may be present
- Evaluate for dissection flap or intramural hematoma
Clinical Significance
- Size and growth rate determine repair timing
- Blood pressure control is critical
Symptoms
- Often asymptomatic
- Possible chest/back pain or hoarseness if compressive
Diagnosis
- CTA chest for measurement and planning
- Labs: renal function prior to contrast use
Treatment
- Strict blood pressure control, smoking cessation
- Endovascular repair (TEVAR) or open surgery when indicated
Prognosis
- Good with surveillance and timely repair; rupture has high mortality
What Should You Do?
- Follow imaging surveillance intervals.
- Take antihypertensives consistently.
- Seek emergency care for sudden chest/back pain.
Medical Disclaimer: Educational only; follow vascular specialist advice.
Correlate with Lab Results
Doctors often check these blood tests when Descending Thoracic Aortic Aneurysm is found on imaging:
Related Imaging Terms
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