thryoid development

Question 1

thyroid diverticulum arises from floor of primitive pharynx (endodermal = gut tissue)→ descends into neck
connected to tongue by thyroglossal duct (normally disappears, may persist as pyramidal lobe of thyroid = benign)
normal remnant of thyroglossal duct is foramen cecum (middle of tongue)

Answer 1

thyroid development

Question 2

foramen cecum

Answer 2

normal remnant of thyroglossal duct

Question 3

most common site for ectopic thyroid tissue

Answer 3

tongue

Question 4

midline neck mass that MOVES with swallowing

Answer 4

thyroglossal duct cyst

REMOVE due to high infection rate

Question 5

lateral neck mass that doesn’t move with swallowing

Answer 5

branchial cleft cyst (persistent cervical sinus)