Larynx

Question 1

Normal thickness of retropharyngeal area at level C6 for adults and children?

Answer 1

Not greater than 22  mm in adults

14  mm in children

Question 2

Causative agent for Croup?

Answer 2

Parainfluenza virus Type 1

Subglottic inflammation
Penciling of subglottic airway
Bacterial croup: excrescences of trachea, diffuse involvement of larynx, trachea and bronch

Question 3

Thickness of retropharyngeal space of C2?

Answer 3

7mm or less

Question 4

Retropharyngeal space location?

Answer 4

Between the middle and deep layers of Deep Cervical fascia

From SKULL BASE TO MEDIASTINUM

Question 5

Imaging signs of vocal cord paralysis?

Answer 5

Paramedian position of VC
Arytenoid displaced anteromedially 
Distended pyriform sinus
Tilting of thyroid cartilage 
Prominent laryngeal ventricle

Question 6

The most common laryngeal and upper tracheal neoplasm in the newborn and infant.

Answer 6

Subglottic hemangioma

> posterior or lateral portion

Question 7

How many percent of laryngocoeles are bilateral?

Answer 7

25%

Internal: within the paraglottic space
External: pierces the thyrohyoid membrane
Mixed

Question 8

POSTERIOR diverticulum between the cricopharyngeus and inferior constrictor muscle

Answer 8

Zenker

Question 9

Inferior to cricopharyngeus, lateral

Posteriorly

Answer 9

Killian Jamieson

Lamir