🔬
Foundation Sciences · Embryology
Midgut Development
The midgut, supplied by the superior mesenteric artery, undergoes physiological herniation into the umbilical cord and rotates 270° anticlockwise before returning to the abdomen.
📌 Learning Objectives
- Describe the underlying mechanism of Midgut Development.
- Identify the key clinical features and complications of Midgut Development.
- Outline the appropriate investigations and management of Midgut Development.
- Discuss the implications for patients and families of Midgut Development.
📋 Overview
Between weeks 6 and 10 the rapidly growing midgut herniates into the umbilical cord; abnormal return produces malrotation, volvulus or omphalocele. The vitelline duct can persist as Meckel's diverticulum.
🔬 Basic Science
Between weeks 6 and 10 the rapidly growing midgut herniates into the umbilical cord; abnormal return produces malrotation, volvulus or omphalocele. The vitelline duct can persist as Meckel's diverticulum.
🏥 Clinical Relevance
Meckel's diverticulum follows the 'rule of 2s' and may contain ectopic gastric mucosa causing bleeding.
🧪 Investigations
Investigation depends on clinical context: relevant blood tests, imaging, and specific genetic or histopathological tests as appropriate. Refer to specialist services where indicated.
💊 Management
Management is condition-specific and typically multidisciplinary, combining medical therapy, surgical intervention where appropriate, supportive care, and family/genetic counselling.
Revision Resources – expand the sections below for high-yield notes, exam pearls, key facts and further reading.
MLA High-Yield Notes & Quick Revision ⌄
Common SBA themes: recognising the underlying mechanism, identifying classic clinical features, and choosing the first-line investigation or management step. Watch for inheritance pattern and characteristic associations.
midgut
malrotation
volvulus
meckel
omphalocele
- The midgut rotates 270° anticlockwise around the SMA.
- Failure of return causes omphalocele; failure of lateral folding causes gastroschisis.
- Meckel's diverticulum: 2% of population, 2 feet from ileocaecal valve, 2 inches long, 2 tissue types, often by age 2.
- Malrotation predisposes to midgut volvulus and bowel ischaemia.
- The midgut spans from the second part of the duodenum to the proximal two-thirds of the transverse colon.
Exam Pearls ⌄
⭐ High Yield
The midgut rotates 270° anticlockwise around the SMA.
Failure of return causes omphalocele; failure of lateral folding causes gastroschisis.
Meckel's diverticulum: 2% of population, 2 feet from ileocaecal valve, 2 inches long, 2 tissue types, often by age 2.
Malrotation predisposes to midgut volvulus and bowel ischaemia.
The midgut spans from the second part of the duodenum to the proximal two-thirds of the transverse colon.
💡 Clinical Pearl
Midgut: Meckel's diverticulum follows the 'rule of 2s' and may contain ectopic gastric mucosa causing bleeding.
⚠️ Exam Tip — Common Mistakes
Confusing the mechanism of Midgut Development with related conditions.
Missing classic clinical features of Midgut Development in SBA stems.
Failing to consider Midgut Development in the differential diagnosis.
Key Facts ⌄
The midgut rotates 270° anticlockwise around the SMA.
Failure of return causes omphalocele; failure of lateral folding causes gastroschisis.
Meckel's diverticulum: 2% of population, 2 feet from ileocaecal valve, 2 inches long, 2 tissue types, often by age 2.
Malrotation predisposes to midgut volvulus and bowel ischaemia.
The midgut spans from the second part of the duodenum to the proximal two-thirds of the transverse colon.
Related Topics ⌄
References ⌄
- GMC MLA Content Map
- NICE Clinical Knowledge Summaries
- BMJ Best Practice
Further Resources
Medical Portfolio & Career Development
Build a professional portfolio website for applications, audits, teaching, research and career progression.
CVtoWebsite.com →