4. Pancreas and spleen embryology Flashcards Preview

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Flashcards in 4. Pancreas and spleen embryology Deck (14):
1

Pancreas derived from

foregut

2

pancreases embryology - is divided into ( and function)

Ventral pancreatic buds ---> contribute to uncinate process and main pancreatic duct.
The dorsal pancreatic bud alone --> becomes the body, tail, isthmus, and accessory pancreatic duct.

Both the ventral and dorsal buds contribute to pancreatic head.

3

Annular pancreas ( mechanism and presentation)

ventral pancreatic bud abnormally encircles 2nd part of duodenum; forms a
ring of pancreatic tissue that may cause duodenal narrowing and nonbilious vomiting.

4

Pancreas divisum mechanism

ventral and dorsal parts fail to fuse at 8 week

5

Pancreas divisum - mechanism and symptoms

ventral and dorsal parts fail to fuse at 8 week --> mostly assymptomatic but may cause chronic abdominal pain and / or pancreatitis

6

Splee arises ...

in mesentery of stomach ( hence is mesodermal) but has foregut supply celiac trunk --> spleen artery

7

mesntery is a

fold of membranous tissue that arises from posterio wall of the peritoneal cavity and attaches to the interstinal tract

8

• Is the pancreas derived from the foregut, the midgut, or the hindgut?

The foregut

9

• A patient is diagnosed with pancreas divisum, and she asks how this developed. What do you tell her?

Failure of the ventral and dorsal pancreatic buds to fuse during embryologic development

10

• From which dermal layer does the spleen arise: endoderm, mesoderm, or ectoderm?

Mesoderm

11

• The spleen receives blood from the ____ (foregut/midgut/hindgut) vasculature.

Foregut (specifically, the celiac artery) even though the spleen has a mesodermal origin

12

• A patient has a malformed accessory pancreatic duct. What pancreatic bud did not form correctly?

Dorsal pancreatic bud

13

• Ventral pancreatic buds contribute to the formation of these three pancreatic structures.

Pancreatic head, main pancreatic duct, and uncinate process

14

• A child has malformed mesentery of the stomach. What mesodermal organ that is supplied by the celiac artery are you concerned about?

Spleen

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