Thoracic Outlet Syndrome (TOS) Overview
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Questions and Answers

What is the approximate percentage of the population affected by TOS?

  • 5-6%
  • 10-12%
  • 8% (correct)
  • 1-2%

    • What is the female to male ratio for TOS?

  • 2:1
  • 1:1
  • 4:1
  • 3:1 (correct)

    • Which of the following is not a common anatomical defect associated with TOS?

  • Abnormal bonds and ligaments
  • Cervical rib
  • Long C7 transverse process
  • Fracture of the humerus (correct)

    • What percentage of TOS cases affect the vascular structures such as the subclavian artery and vein?

    <p>2-5%</p> Signup and view all the answers

    What is the most common side affected by a cervical rib in TOS?

    <p>Right</p> Signup and view all the answers

    Which of the following is not a common muscle anomaly associated with TOS?

    <p>Biceps tendon rupture</p> Signup and view all the answers

    Where does the brachial plexus and subclavian artery pass through in TOS?

    <p>Anterior and middle scalene muscles</p> Signup and view all the answers

    Which part of the brachial plexus is typically affected in TOS?

    <p>Lower trunk</p> Signup and view all the answers

    What is the typical age range for TOS?

    <p>20-40 years</p> Signup and view all the answers

    What is the primary cause of compression on the brachial plexus and subclavian artery in TOS?

    <p>All of the above</p> Signup and view all the answers

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