Brachial Cleft derivatives Flashcards Preview

USMLE > Brachial Cleft derivatives > Flashcards

Flashcards in Brachial Cleft derivatives Deck (4)
Loading flashcards...
1

Brachial clefts are derived from what layer?

Ectoderm

2

1st brachial cleft derivative

external auditory meatus

3

2nd through 4th cleft

temporary cervical sinuses
(obliterated by proliferation of 2nd arch mesenchyme)

4

Branchial cleft cyst

and what differentiates it from a thyroglossal duct cyst

Persistent cervical sinus ---> branchial cleft cyst within lateral neck.

Key features differentiating it from a thyroglossal duct cyst :
1. lateral neck
2. does not move when you ask the patient to swallow