Stomach antrum

EGD One ulcer located on the antrum of the stomach measuring 3 cm in diameter no bleeding or obstruction noted... 

Antrectomy Surgical excision of the wall of the antrum, the region of the stomach that produces the hormone gastrin. 

Figure 4. Close-up view of the GG-loaded gel in the pyloric antrum of the stomach. Surface erosion is indicated by arrowheads.

Antrum terminal region of the stomach leading to the gastroduodenal junction... 

A scheme illustrating the possible mechanisms by which N -methylhistamine produced by H.p. may influence parietal cell function is shown in Figure 3. This scheme clearly shows that N -methylhistamine produced by H.p. could change the regulation of acid secretion in two opposite ways its effect on histamine formation in the fundus could reduce acid secretion, whereas the effect on somatostatin in the antrum could induce hypergastrinemia and thus increase acid secretion One could speculate that the final effect of this bacterium on acid production would depend on its distribution in the stomach. 

Schubert, M.L., Harrington, L., Makhlouf,. G.M., 1993. Histamine H3-receptors are coupled to inhibition of somatostatin secretion in the fundus and antrum of the stomach. Gastroenterology 104 (Suppl), A854. 

Stomach. The stomach is the first digestive organ that a drug encounters in the alimentary canal. The human stomach can be divided anatomically into (1) the cardia, the gastroesophageal sphincter, (2) the fundus, the uppermost part of stomach, (3) the body, a reservoir for food and fluids, and (4) the antrum, the lower part of the stomach. The diameter of the stomach in the fed state is quite variable depending on the area. The antrum diameter does not change much in the fed state, whereas the diameter of the body may increase several-fold. 

Patterson is referred to a gastroenterologist for endoscopy to examine the gastric mucosa. There are signs of inflammation in both the antrum and body of the stomach and an area of ulceration is visualized in the pylorus. Tests for Helicobacter pylori (H. pylori) are positive. Patterson was treated successfully with a course of antibiotics to eradicate the H. pylori infection and a proton pump inhibitor. 

Microsomes were prepared from the antrum and corpus regions of rat stomach. The microsomal fraction from 1 g of wet tissue was suspended in 50 fiL of 0.25 M sucrose containing 20 m M Tris-HCl (pH 7.2). 

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