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Case of the Week 449


What is the most likely diagnosis?

  • 63 year-old female with cough



Frontal and Lateral Chest Radiograph

  1. Fracture of Clavicle
  2. Aortic Aneurysm
  3. Lymphoma
  4. Aberrant Left Subclavian Artery
  5. Aberrant Right Subclavian Artery

Additional Image - Axial CT and MRI of Chest

 

Additional Images

 

Axial CT and MRI of Chest


Answer:

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5. Aberrant Right Subclavian Artery

.

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More (Click Discussion Tab)

 

 

Aberrant Right Subclavian Artery

 

General Considerations

  • Occurs in less than 1% of people
  • RSCA passes posterior to esophagus
  • Pushes trachea and esophagus forward
  • Produces oblique shadow above aortic arch on frontal film
  • Origin of RSCA may be dilated
    • Diverticulum of Kommerell technically was defined with a right aortic arch and anomalous left subclavian artery (LSCA)

MORE . . .

 


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LearningRadiology.com
is an award-winning educational website aimed primarily at medical students and radiology residents-in-training, containing  lectures, handouts, images, Cases of the Week, archives of cases, quizzes, flashcards of differential diagnoses and “most commons” lists, primarily in the areas of chest, GI, GU cardiac, bone and neuroradiology.