Lack of inferior thyroid artery

Area of Science:

• Anatomical variations
• Human anatomy
• Vascular anatomy

Background:

• Subclavian arteries are major vessels supplying the upper body.
• Variations in their branches can impact surgical procedures.
• Understanding these variations is crucial for anatomical accuracy.

Observation:

• A cadaver presented unique variations in subclavian artery branches.
• The right inferior thyroid artery was absent.
• Abnormal ramification of the right superior thyroid artery was noted.

Findings:

• The left inferior thyroid artery exhibited a terrace-like course.
• Variations in the prevertebral segment of both vertebral arteries were observed.
• One vertebral artery showed a high entry into the transverse cervical foramen.

Implications:

• These arterial variations have potential significance for surgical planning.
• Diagnostic imaging interpretation may be affected by these anomalies.
• Detailed morphometric analysis aids in understanding vascular anomalies.