CONGENITAL ANOMALIES OF AIRWAY
AND LUNG PARENCHYMA
DR.GOPAL CHAWLA
JUNIOR RESIDENT,
DEPT OF PULMONARY MEDICINE, GMC, PATIALA
1
, SEMINAR OUTLINE
•INTRODUCTION
•EMBRYOLOGY OF LUNG DEVELOPMENT
•CLASSIFICATION
•INDIVIDUAL AMOMALIES
•CONCLUSION
2
, INTRODUCTION
•Developmental anomalies of lung are usually detected in neonatal
period and early childhood
•Some are not encountered until late childhood and adulthood
•Some can be confused with more sinister abnormalities
•While some can often be missed
•An understanding of imaging features and the clinical presentation
is important for any respiratory physician
3
, Embryologic Development of the Lungs
•The intrauterine development of the human lung has been divided into five phases:
embryonic, pseudoglandular, canalicular, saccular, and alveolar
•During the fourth week (26th day) of gestation the Respiratory diverticulum (lung
bud)appears as an outgrowth from the ventral wall of the foregut .
•Next 2days right and left bud arise from outpouching.
•Respiratory portion of gut becomes separated from esophageal by tracheoesophageal
septum
•Lung buds elongate into primary lung sac and the 5 lobar bronchi appear upto 5th week
this is Embryonic phase
•
4
AND LUNG PARENCHYMA
DR.GOPAL CHAWLA
JUNIOR RESIDENT,
DEPT OF PULMONARY MEDICINE, GMC, PATIALA
1
, SEMINAR OUTLINE
•INTRODUCTION
•EMBRYOLOGY OF LUNG DEVELOPMENT
•CLASSIFICATION
•INDIVIDUAL AMOMALIES
•CONCLUSION
2
, INTRODUCTION
•Developmental anomalies of lung are usually detected in neonatal
period and early childhood
•Some are not encountered until late childhood and adulthood
•Some can be confused with more sinister abnormalities
•While some can often be missed
•An understanding of imaging features and the clinical presentation
is important for any respiratory physician
3
, Embryologic Development of the Lungs
•The intrauterine development of the human lung has been divided into five phases:
embryonic, pseudoglandular, canalicular, saccular, and alveolar
•During the fourth week (26th day) of gestation the Respiratory diverticulum (lung
bud)appears as an outgrowth from the ventral wall of the foregut .
•Next 2days right and left bud arise from outpouching.
•Respiratory portion of gut becomes separated from esophageal by tracheoesophageal
septum
•Lung buds elongate into primary lung sac and the 5 lobar bronchi appear upto 5th week
this is Embryonic phase
•
4
