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Related Concept Videos

Aneurysm II: Clinical Manifestations and Diagnostic Studies01:21

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Thoracic, aortic arch and abdominal aneurysms are significant vascular conditions that can present with various clinical manifestations and lead to serious complications. Understanding these manifestations and the appropriate diagnostic studies is essential for effective management and treatment.Thoracic Aortic AneurysmsThoracic aortic aneurysms often remain asymptomatic until they reach a size that impinges on adjacent structures. They typically cause deep, diffuse chest pain that radiates to...
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Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

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Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...
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Thoracic Aorta01:15

Thoracic Aorta

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The thoracic section of the aorta begins at the T5 vertebra and extends to the T12 level at the diaphragm, initially progressing through the mediastinum to the left of the spinal column. Throughout its course in the thoracic segment, the thoracic aorta emits various offshoots known collectively as visceral and parietal branches. The branches that predominantly supply blood to visceral organs are termed visceral branches and include bronchial, pericardial, esophageal, and mediastinal arteries,...
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The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
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Radiological Investigation III: Pulmonary Angiogram and PET Scan01:13

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Radiological investigations are paramount in the diagnosis and management of various pulmonary diseases. Two essential investigations are the Pulmonary Angiogram and the Positron Emission Tomography (PET) Scan.
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Once the aorta traverses the diaphragmatic plane at the aortic hiatus, it is known as the abdominal aorta. This anatomical structure is positioned leftward of the spinal column, encased within a cocoon of adipose tissue behind the peritoneal cavity. It terminates at the L4 vertebra, where it splits into the common iliac arteries. Prior to this bifurcation, the abdominal aorta gives rise to several vital branches.
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Related Experiment Video

Updated: Sep 19, 2025

Author Spotlight: Using Point-of-Care Ultrasound for Comprehensive Evaluation of the Abdominal Aorta
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Double Aortic Contour in Chest Radiography.

Thomas Saliba1, David Rotzinger1, Denis Tack2

  • 1Radiology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, CHE.

Cureus
|June 16, 2025
PubMed
Summary
This summary is machine-generated.

Subtle mediastinal lymphadenopathy, especially in the left paraaortic region, can be missed on chest X-rays. A double aortic contour on radiography may indicate lymphadenopathy, requiring CT confirmation.

Keywords:
adenopathyaortachest x-raydouble aortic contourmediastinum

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Area of Science:

  • Radiology
  • Oncology
  • Thoracic Imaging

Background:

  • Mediastinal lymphadenopathy can be challenging to detect on chest radiographs, particularly in the left paraaortic region due to obscuration by the normal left paraaortic stripe.
  • Early detection is critical for patients with a history of malignancy, such as renal cell carcinoma, who may present with vague symptoms like fatigue, dyspnea, or weight loss.

Observation:

  • A case is presented of an 82-year-old male with a history of renal cell carcinoma who developed fatigue, dyspnea, and weight loss.
  • Initial chest X-ray revealed a suspicious "double aortic contour," an abnormality not present on prior imaging.
  • This finding prompted a computed tomography (CT) scan, which confirmed a 2 cm left paraaortic lymph node metastasis.

Findings:

  • The "double aortic contour" sign on chest radiography can indicate mediastinal lymphadenopathy, caused by an adjacent mass displacing mediastinal fat.
  • Detection can be difficult due to variable pleural reflections and the size or location of the lymph nodes.
  • Comparative imaging significantly aids in identifying subtle changes.

Implications:

  • Recognition of the double aortic contour sign is crucial for diagnosing mediastinal lymphadenopathy.
  • Computed tomography (CT) remains essential for confirming suspected mediastinal lymphadenopathy, as chest X-rays have limitations and high rates of false negatives.
  • Prompt diagnosis and intervention, such as surgical resection, can be vital in managing metastatic disease.