Development of Midgut (Special Embryology)

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Anatomy of Anatomy of IntestineIntestine

Dr. Sherif Fahmy

Dr. Sherif Fahmy

Dr. Sherif Fahmy

Development Development of Mid-gutof Mid-gut(Page 85)(Page 85)

Dr. Sherif Fahmy

Dr. Sherif Fahmy

Dr. Sherif Fahmy

Mesoderm

Hindgut

Midgut

Pericardial bulge Vitelline ductDefinitive yolk sac

L.S. in folded embryo

Dr. Sherif Fahmy

Dr. Sherif Fahmy

Dr. Sherif Fahmy

Dr. Sherif Fahmy

Dr. Sherif Fahmy

Dr. Sherif Fahmy

Dr. Sherif Fahmy

Anomalies of MidgutAnomalies of Midgut1- 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 intestinal Stenosis or atresia of intestinal lumenlumen

4- 4- Subhepatic cecum and appendixSubhepatic cecum and appendix Dr. Sherif Fahmy

5- Abnormal rotation of midgut loopA- 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 Fahmy

Dr. Sherif Fahmy

Dr. Sherif Fahmy

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