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step 1 - embryo > GI > Flashcards

GI Flashcards

1
Q

foregut components?

A

pharynx to duodenum

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2
Q

midgut components?

A

duodenum to prox 2/3 of transverse colon

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3
Q

hindgut components?

A

distal 1/3 transverse colon –> anal canal above pectinate line

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4
Q

sternal abdominal defects caused by?

A

rostral fold closure failure

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5
Q

omphalocele/gastrocele caused by?

A

lateral fold closure failure

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6
Q

bladder exstrophy caused by?

A

caudal fold closure failure

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7
Q

what is the mechanism of duodenal atresia?

A

failure to recanalize

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8
Q

what is the mechanism of jej/ileal/colonic atresia?

A

vascular accident - “apple peel atresia”

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9
Q

when does midgut herniate through umbilical ring?

A

6th week

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10
Q

when does midgut return into abdomen? what does it rotate around?

A

10th week

SMA

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11
Q

gastroschisis vs omphalocele?

A

gastroschisis: lateral, not covered by peritoneum
omphalocele: central, covered by peritoneum

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12
Q

MC type of tracheoesophageal anomaly?

A

EA with distal TEF
drooling, choking, vomiting w/ first feed
air visible in stomach on CXR
cyanosis 2/2 laryngospasm

dx: try to pass NG tube

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13
Q

H type tracheoesoph anomaly?

A

pure TEF - no atresia

looks like letter H

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14
Q

what portion of gut does the pancreas come from?

A

foregut

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15
Q

what parts of the pancreas come from the ventral bud?

A

uncinate process

main pancreatic duct

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16
Q

what parts of the pancreas come from the dorsal bud?

A

body
tail
isthmus
accessory pancreatic duct

17
Q

which buds contribute to the pancreatic head?

A

ventral and dorsal

18
Q

pancreas encircling 2nd part of duodenum, may cause narrowing?

A

annular pancreas

caused by ventral bud migration anomaly

19
Q

pancreas divisum?

A

ventral and dorsal buds fail to fuse (8 wks)

common, usually asx - may have bad pain and/or pancreatitis

20
Q

what’s the deal with the spleen?

A

mesodermal - from stomach mesentery

arterial supply from foregut - celiac artery

step 1 - embryo (7 decks)

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