| A septum of connective tissue separates the circular muscle layers of the pylorus and duodenum. |
| The former includes the fundus and the rostral two-thirds of the corpus, while the latter constitutes the rest of the corpus, the antrum, and the pylorus. |
| Three antral biopsies were obtained within 2-5cm from the pylorus. |
| If it is exactly in the midline, it may be the duodenal bulb, the pylorus, or the distal antrum. |
| Unless a duodenal switch is performed to lessen absorption, the pylorus and small intestine remain intact. |
| The muscle of the pylorus does, however, show the high degree of myogenic tone characteristic of other sphincters. |
