The document discusses the development of the mid-gut and anomalies that can occur. It describes how during development, the mid-gut rotates within the abdomen and how abnormalities in this rotation can lead to anomalies like the ascending colon being on the left side. It also lists several common anomalies of the mid-gut mesenteries, including mobile cecum and reto-colic pocket. Finally, it discusses other mid-gut anomalies such as stenosis or atresia of the intestinal lumen, subhepatic cecum and appendix, and remnants of the vitelline duct that can form structures like Meckel's diverticulum.

1. Anatomy ofAnatomy of
IntestineIntestine
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4. DevelopmentDevelopment
of Mid-gutof Mid-gut
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7. Mesoderm
Hindgut
Midgut
Pericardial bulge
Vitelline duct
Definitive yolk sac
L.S. in folded embryo
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14. Anomalies of MidgutAnomalies of Midgut
1-1- Anomalies of mesenteries:Anomalies of mesenteries:
- Mobile cecum.- Mobile cecum.
- Reto-colic pocket.- Reto-colic pocket.
2-2- Body wall defect:Body wall defect:
- Omphalocele.- Omphalocele.
- Gastroschisis.- Gastroschisis.
- Infantile umbilical hernia.- Infantile umbilical hernia.
3-3- Stenosis or atresia of intestinalStenosis or atresia of intestinal
lumenlumen
4-4- Subhepatic cecum and appendixSubhepatic cecum and appendix
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15. 5- Abnormal rotation of midgut loop
A- Arrest of rotation after 90 degree
- Ascending colon and cecum are on left
side of abdomen.
B- Rotation for 90 degree to opposite
direction
- Transverse colon is deep to duodenum.
6- Remenants of vitelline duct
-Meckel’s diverticulum.
-Vitelline cyst
-Vitelline fistula. Dr. Sherif

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