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An unusual course of the thoracic duct in relation to the vertebral vessels

D Kaur1, M Jain, U Dhall

  • 1Department of Anatomy, Maharaja Agrasen Medical College, Agroha Hisar, Haryana, India. dalbirshelly@rediffmail.com

Singapore Medical Journal
|January 19, 2012
PubMed

Insights

A rare thoracic duct anatomical variation was discovered in the neck. This duct coursed posterior to the vertebral vein and split into two distinct drainage points, a finding crucial for surgical safety.

Area of Science:

  • Anatomy
  • Surgical Anatomy
  • Vascular Anatomy

Background:

  • The thoracic duct is the largest lymphatic vessel in the body.
  • Its typical anatomical course is well-documented, but variations can occur.
  • Understanding these variations is critical for preventing iatrogenic injury during neck procedures.

Observation:

  • A male cadaver exhibited an atypical course of the thoracic duct in the cervical region during a routine head and neck dissection.
  • The thoracic duct was observed posterior to the vertebral vein and anterior to the vertebral artery.
  • This specific anatomical relationship to the vertebral vein appears to be a novel finding.

Findings:

  • The thoracic duct followed an aberrant path, coursing posterior to the vertebral vein.
  • Post-bifurcation, the thoracic duct divided into two distinct branches.
  • One branch drained into the junction of the internal jugular and subclavian veins, while the other emptied directly into the subclavian vein.

Implications:

  • This reported anatomical variation highlights the importance of detailed pre-operative assessment.
  • Awareness of such thoracic duct anomalies can help prevent inadvertent surgical injury during neck procedures.
  • Accurate anatomical knowledge is critical for surgeons operating in the root of the neck to avoid complications.

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