Congenital Anomalies of Larynx Congenital Anomalies of Larynx ? The larynx develops from the PDF Download

 Page 1


Congenital 
Anomalies of Larynx 
Page 2


Congenital 
Anomalies of Larynx 
? The larynx develops from the 
fourth and fifth branchial 
arches. At the third week of 
gestation, the respiratory 
primordium is derived from the 
primitive foregut to later form 
the lung bud and later the 
bronchial bud which will 
eventually develop into the 
tracheobronchial tree.   
? At the fourth and fifth week of 
gestation the tracheo-
oesophageal folds fuse to 
form the tracheo-oesophageal 
septum leading to the 
separation of the tracheal 
airway lumen from the 
esophageal digestive tract.  
Page 3


Congenital 
Anomalies of Larynx 
? The larynx develops from the 
fourth and fifth branchial 
arches. At the third week of 
gestation, the respiratory 
primordium is derived from the 
primitive foregut to later form 
the lung bud and later the 
bronchial bud which will 
eventually develop into the 
tracheobronchial tree.   
? At the fourth and fifth week of 
gestation the tracheo-
oesophageal folds fuse to 
form the tracheo-oesophageal 
septum leading to the 
separation of the tracheal 
airway lumen from the 
esophageal digestive tract.  
Page 4


Congenital 
Anomalies of Larynx 
? The larynx develops from the 
fourth and fifth branchial 
arches. At the third week of 
gestation, the respiratory 
primordium is derived from the 
primitive foregut to later form 
the lung bud and later the 
bronchial bud which will 
eventually develop into the 
tracheobronchial tree.   
? At the fourth and fifth week of 
gestation the tracheo-
oesophageal folds fuse to 
form the tracheo-oesophageal 
septum leading to the 
separation of the tracheal 
airway lumen from the 
esophageal digestive tract.  
Development of Larynx 
? Larynx develops from 
the caudal hypobranchial 
eminence which later 
becomes the epiglottis 
and the cuneiform 
cartilages.  
? Laryngotracheal groove 
is formed at the level of 
the 6th arch and its 
opening is further 
developed to become T 
shaped. On the sides of 
the ‘T’ will be the 
connection of the two 
arytenoids swellings. 
 
Page 5


Congenital 
Anomalies of Larynx 
? The larynx develops from the 
fourth and fifth branchial 
arches. At the third week of 
gestation, the respiratory 
primordium is derived from the 
primitive foregut to later form 
the lung bud and later the 
bronchial bud which will 
eventually develop into the 
tracheobronchial tree.   
? At the fourth and fifth week of 
gestation the tracheo-
oesophageal folds fuse to 
form the tracheo-oesophageal 
septum leading to the 
separation of the tracheal 
airway lumen from the 
esophageal digestive tract.  
Development of Larynx 
? Larynx develops from 
the caudal hypobranchial 
eminence which later 
becomes the epiglottis 
and the cuneiform 
cartilages.  
? Laryngotracheal groove 
is formed at the level of 
the 6th arch and its 
opening is further 
developed to become T 
shaped. On the sides of 
the ‘T’ will be the 
connection of the two 
arytenoids swellings. 
 
? The arytenoid swelling later 
on become the arytenoid 
cartilages. The transverse 
groove forming the 
transverse bar of the T will 
form the ary-epiglottic folds 
and muscles together with 
the corniculate cartilages of 
the larynx. 
? The laryngotracheal groove 
itself forms the respiratory 
tract. Its proximal end forms 
the trachea, the middle forms 
the bronchi while the distal 
forms the lungs.