The Thyroid

Question 1

What is the blood supply of the thyroid?

Answer 1

Superior thyroid artery (ECA)
Inferior thyroid artery (Thyrocervical trunk)
Thyroid ima (2-12%)

Question 2

What is the venous drainage of the thyroid?

Answer 2

Superior, middle, and inferior thyroid veins

Question 3

What is the innervation of the thyroid?

Answer 3

Superior, middle, and inferior cervical ganglia of the sympathetic trunk
Parasympathetic fibers from the vagus nerve

Question 4

Where is the tubercle of Zuckerandl located?

Answer 4

Posterolateral aspect of the thyroid lobe

Question 5

Where is recurrent laryngeal nerve in relation to tubercle of Zuckerandl?

Answer 5

Medial to the tubercle in 93% of patients

Question 6

Where is the thyroid anatomically?

Answer 6

Usually 2nd to 4th tracheal ring
Middle layer (pretracheal) of deep cervical fascia
Posterior to sternohyoid and sternothyroid muscles

Question 7

Ligaments of the thyroid

Answer 7

Attached superior-medially by the anterior suspensory ligament
Connects posterior-medially to the 1st and 2nd tracheal ring and the cricoid cartilage by Berry’s ligament