1
Q
First - type I
A
parallels the EAC
2
Q
first - type II
A
at the angle of the mandible
involves the parotid gland
ends in EAC
3
Q
second
A
below the angle of the jaw anterior to the SCM between ICA and ECA superficial to the hypoglossal and glossopharyngeal n ends in tonsillar fossa
4
Q
third
A
deep to SCM deep to ICA/ECA and glossopharyngeal n superficial to vagus and hypoglossal nerves through thyohyoid membrane superior to the superior laryngeal nerve pyriform sinus
5
Q
fourth
A
within thyroid or mediastinum
inferior to the superior laryngeal nerve
parallel to RLN
pyriform sinus
6
Q
Structures from hillock of His
A
1: tragus
2: helical crus
3: helix
4: anti helical crus
5: anti helix
6: anti tragus
7
Q
which hillocks are derived from what branchial structures
A
1-3: first branchial arch
4-6: second branchial arch
