Embryology Flashcards
Develops into esophagus to upper duodenum
Foregut
Develops into lower duodenum to proximal 2/3 of transverse colon
Midgut
Develops into distal 1/3 of transverse colon to anal canal above pectinate line
Hindgut
Physiologic midgut herniates through umbilical ring at what week
6th week
Midgut returns to abdominal cavity and rotates around SMA
10th week
Amount of degrees midgut rotates around SMA when returning to abdominal cavity in 10th week of development
270 degrees
Extrusion of abdominal contents through abdominal folds and not covered by peritoneum or amnion
Gastroschisis
Persistent herniation of abdominal contents into umbilical cord, sealed by peritoneum
Omphalocele
Incomplete closure of umbilical ring - many close spontaneously
Congenital umbilical hernia
Failure of rostral fold closure leads to what defects
Sternal defects like ectopia cordis
Failure of lateral fold closure leads to what defects
Omphalocele and gastrochisis
Failure of caudal fold closure leads to what defects
bladder exstrophy
Most common type of tracheoesophageal anomaly
EA with distal TEF
CXR finding in pure EA
Gasless abdomen on CXR
Consequence of EA or TEF in utero
Polyhydramnios
Symptoms in neonates with EA with distal TEF or TEF
Drool, choke and vomit with first feeding