| caecal folds | The two peritoneal folds that border the retrocaecal fossa. Synonym: plicae caecales. (05 Mar 2000) |
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| palmate folds | The two longitudinal ridges, anterior and posterior, in the mucous membrane lining the cervix uteri, from which numerous secondary folds, or rugae, branch off. Synonym: plicae palmatae, arbor vitae uteri, lyra uterina. (05 Mar 2000) |
| gastric folds | Characteristic folds of the gastric mucosa, especially evident when the stomach is contracted. Synonym: plicae gastricae, gastric folds, ruga gastrica. (05 Mar 2000) |
| gastropancreatic folds | The folds of peritoneum in the omental bursa that encase the hepatic and left gastric arteries as these vessels pass toward their destinations. Synonym: plicae gastropancreaticae. (05 Mar 2000) |
| rectal folds | The three or four crescentic folds placed horizontally in the rectal mucous membrane; the superior rectal fold is situated near the beginning of the rectum on the left side; the middle rectal fold (Nelaton's fold) is most prominent and consistent and projects from the right side about 8 cm above the anus (approximately the level of the floor of the rectouterine or rectovesical pouch); the inferior rectal fold is on the left side about 5 cm above the anus. Synonym: plicae transversales recti, Houston's folds, Houston's valves, Kohlrausch's valves, plicae recti, rectal folds, rectal valves. (05 Mar 2000) |
| giant gastric folds | Enlarged gastric submucosal ridges covered by hyperplastic mucosa, as seen in Zollinger-Ellison syndrome, Menetrier's disease, and hypertrophic hypersecretory gastropathy. (05 Mar 2000) |
| medullary folds | Synonym: neural folds. (05 Mar 2000) |
| Rindfleisch's folds | Semilunar fold's of the serous surface of the pericardium, embracing the beginning of the aorta. (05 Mar 2000) |
| ciliary folds | A number of low ridges in the furrows between the ciliary processes; together with the processes they constitute the corona ciliaris. Synonym: plicae ciliares. (05 Mar 2000) |
| circular folds | The numerous folds of the mucous membrane of the small intestine, running transversely for about two-thirds of the circumference of the gut. Synonym: circular folds, Kerckring's folds, Kerckring's valves, valvulae conniventes. (05 Mar 2000) |
| mucosal folds of gallbladder | The interlacing folds of the mucosa that produce a honeycomb appearance in the interior of the gallbladder. Synonym: plicae tunicae mucosae vesicae felleae. (05 Mar 2000) |
| sacrogenital folds | Peritoneal fold's that extend backward from the sides of the bladder of the male or uterus of the female on either side of the rectum to the sacrum, forming the lateral boundaries of the rectovesical pouch. See: sacrouterine fold, sacrovesical fold. (05 Mar 2000) |
| Houston's folds | The three or four crescentic folds placed horizontally in the rectal mucous membrane; the superior rectal fold is situated near the beginning of the rectum on the left side; the middle rectal fold (Nelaton's fold) is most prominent and consistent and projects from the right side about 8 cm above the anus (approximately the level of the floor of the rectouterine or rectovesical pouch); the inferior rectal fold is on the left side about 5 cm above the anus. Synonym: plicae transversales recti, Houston's folds, Houston's valves, Kohlrausch's valves, plicae recti, rectal folds, rectal valves. (05 Mar 2000) |
| neural folds | The elevated margins of the neural groove. Synonym: medullary folds. (05 Mar 2000) |
| Duncan's folds | The fold's on the peritoneal surface of the uterus immediately after delivery. (05 Mar 2000) |