Gastroenterology

Gastroenterology

What you need to know about crohn’s disease

Crohn’s diseasemay affect any part of the gastrointestinal tract from the mouth to the anus. It is most common in the terminal ileum and ascending colon. Crohn’s disease is more frequent in the Western world, particularly amongst Caucasians, where the prevalence is approximately 50–100 per 100 000. Its peak onset is between 20 and 40 years […]

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Gastroenterology

Gastric secretion and its cells

The stomach acts as a reservoir for food, releasing the gastric contents into the duodenum at a steady rate. Relaxation of the LOS and arrival of food in the stomach is followed by a receptive relaxation of the fundus and body of the stomach. This is mediated by a vagal reflex, which inhibits the smooth muscle […]

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Gastroenterology

Esophageal varices and mallory-weiss syndrome

Esophageal varices are dilated veins at the junction of the esophagus and the stomach. This is a site of a connection between the systemic and portal venous systems (portosystemic anastomosis). Normally, the connections are closed, but in patients with cirrhosis of the liver and portal hypertension the raised pressure in the portal system causes them to […]

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