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Embryology > Development of Midgut > Flashcards

Development of Midgut Flashcards

1
Q

Borders of Midgut

A

from ampulla of vater to junction of 2/3rd and 1/3rd of transverse colon

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2
Q

Physiological herniation of Midgut occurs by

A

6th week

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3
Q

Physiological herniation of Midgut disappears by

A

10th week

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4
Q

Midgut is divided by

A

SMA

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5
Q

Pre-arterial segment of Midgut contains

A

Distal Duodenum
jejunum
Ileum

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6
Q

Post-arterial segment of Midgut contains

A 
terminal ileum 
Ascending colon
appendix
caecum
2/3rd of Transverse colon
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7
Q

What is Vitellointestinal duct

A

Herniation of Midgut in to Yolksac

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8
Q

Persistence of part of Vitellointestinal duct is

A

Meckel’s Diverticulum

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9
Q

Meckel’s Diverticulum - Rule of 2

A

2% of population
2 feet from ileocecal valve
2 inch long

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10
Q

Enterocystoma

A

Vitelline cyst

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11
Q

Fecal discharge at umbilicus

A

Vitelline fistula

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12
Q

persistence of entire vitellointestinal duct

A

vitelline fistula.

Fecal discharge at umbilicus

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13
Q

How many rotations of Midgut

A

3 - 90 degree rotations anti clockwise

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14
Q

Location of caecum after 3rd rotation of Midgut

A

below liver

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15
Q

Non rotation of Midgut

A

only first rotion happens.
Small intestine on Right side
Large intestine on Left side

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16
Q

Mixed rotation of Midgut

A

two normal rotations
Ladd’s band
Sub-pyloric caecum
Mid gut colvulus

17
Q

Ladd’s band
Sub-pyloric caecum
Mid gut colvulus
seen in

A

Mixed rotation of Midgut

18
Q

Reverse rotation of Midgut

A

SMA compressing transverse colon

19
Q

SMA compressing transverse colon is seen in

A

Reverse rotation of Midgut

20
Q

Failure of reduction of Physiological hernia

A

Omphalocele

21
Q

Omphalocele

A

Failure of reduction of Physiological hernia
Sac - present
Liver, intestine are present outside
Associated with other congenital anomalies

22
Q

Hernia at the site of regression of Right umbilical vein

A

Gastroschisis

23
Q

Gastroschisis

A

Hernia at the site of regression of Right umbilical vein
Sac absent
Only intestine outside
MC feature - Intestinal obstruction
not Associated with other congenital anomalies

Embryology (16 decks)

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