GI Embryo and Anatomy

Question 1

Parts of GI tract from: Foregut, midgut, hindgut?

Answer 1

pharynx to duodenum
duodenum to transverse colon
distal transverse colon to rectum

Question 2

Extrusion of abdominal contents not covered by peritoneum? Defect in?

Answer 2

gastroschisis. Lateral fold closure

Question 3

Persistence of herniation of abdominal contents into umbilical cord, covered by peritoneum? Defect in?

Answer 3

omphalocele. Lateral fold closure

Question 4

Rostal fold closure vs lateral fold closure?

Answer 4

sternal defects vs omphalocele/gastroschisis

Question 5

Failure recanalize duodenum. Disease?

Answer 5

trisomy 21

Question 6

Failure to recanalize Jejunal, ileal, colonic atresia may result from?

Answer 6

vascular accident

Question 7

2 Midgut development timepoints?

Answer 7

week 6 - herniates through unbilical ring

week 10 returns to abdominal cavitity and rotates around SMA

Question 8

Newborn with cyanosis, drooling, choking and vomiting after 1st feeding. Why cyanotic?

Answer 8

tracheoesophageal abnormalities. Cyanosis from laryngospasm to avoid reflex-related aspiration

Question 9

Most common type of tracheoesophageal abnormalitie?

Answer 9

ESO atresia with distal TEF

Question 10

Newborn with nonbilious projectile vomit after 2 weeks. Palpable mass in stomach. Most often found in?

Answer 10

Congenital pyloric stenosis. First born males

Question 11

Ventral pancreatic bud becomes?

Answer 11

Uncinate and form Head and main duct with dorsal bud

Question 12

Dorsal pancreatic bud becomes?

Answer 12

Body, tail, isthmus, accessory pancreatic duct (everything other than uncinate). Forms head and main duct with ventral bud

Question 13

Spleen arises from? Blood from?

Answer 13

mesentary of stomach. Celiac artery (from foregut)

Question 14

Annular Pancreas?

Answer 14

Ventral pancreatic bud forms ring around duodenum

Question 15

Pancreas divisum?

Answer 15

Ventral and dorsal pancreatic buds fail to fuse