11/1/2013

11/1/2013

Answers:

All of the following are true regarding Aural Atresia except:
A) Due to failure of second branchial groove to form properlyB) 15% of patients have + family hx
C) Often unilateral
D) Affects M>F
E) Causes CHL

Aural atresia is due to failure of the first branchial groove to form properly. All of the other answers choices are true with regards to aural atresia.

Microtia is due to abnormal development of what embryonic structure(s)?

Microtia (hypoplasia of the external ear) is due to abnormal development of the first (mandibular) and second (hyoid) branchial arches.

MC Questions:
Which layers of the TM regenerate after perforation?
A) Lateral Squamous Layer
B) Middle Fibrous Layer
C) Medial Mucosal Layer
D) A+B
E) A+C
F) B+C
G) All three layers

Free Response Question:
In what population and after what trauma is keloid formation most likely?

Quick Facts:

Prussak's Space
-Pouch posterior to pars flaccida.
-Pars flaccida laterally
-Neck of malleus medially
-Lateral mallear fold superiorly
-Lateral process of malleus inferiorly.
-Retraction pockets/perfs over this region can lead to cholesteatoma formation.