| 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) |
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| 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) |
| interdigital folds | One of the folds of skin, or rudimentary web, between the fingers and toes. Synonym: interdigital folds, plica interdigitalis. (05 Mar 2000) |
| thickened duodenal folds | <radiology> Inflammatory, peptic ulcer (most common cause), Zollinger-Ellison syndrome, pancreatitis, cholecystitis, Crohn disease, infection (TB, parasites, cryptosporidia in AIDS), neoplastic, lymphoma, infiltrative, Whipple disease, amyloidosis, eosinophilic enteritis, vascular, intramural haematoma, ischemia, oedema, hypoproteinaemia, portal hypertension, congestive heart failure (12 Dec 1998) |
| thickened gastric folds | <radiology> Hyperacidic state, peptic ulcer disease, Zollinger-Ellison syndrome, hypoproteinaemia, lymphoma, pseudolymphoma, eosinophilic gastroenteritis, varices, Menetrier disease, inflammatory bowel disease (UC and Crohn), TB, syphilis (12 Dec 1998) |
| thick small bowel folds | <radiology> Haemorrhage, oedema, ischemia, sprue, malabsorption, hypoproteinaemia, Whipple disease, amyloidosis, Henoch-Schonlein syndrome, abetalipoproteinaemia, Crohn disease (12 Dec 1998) |
| transverse 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) |
| epiglottic folds | One of the three folds of mucous membrane passing between the tongue and the epiglottis, lateral glossoepiglottic fold on either side, and median glossoepiglottic fold centrally. Synonym: plicae epiglottica. (05 Mar 2000) |
| tubal folds of uterine tubes | Many longitudinal folds in the mucous membrane of the uterine (fallopian) tube. Synonym: plicae tubariae tubae uterinae. (05 Mar 2000) |
| Kerckring's 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) |
| labioscrotal folds | Lateral fold's at either side of the embryonic cloacal membrane that develop into either the scrotum or the labia majora. (05 Mar 2000) |
| lateral folds | Ventral foldings of the lateral margins of the embryonic disk, the development of which establishes the definitive embryonic body form. (05 Mar 2000) |
| angle of iris | The acute angle between the iris and the cornea at the periphery of the anterior chamber of the eye. Synonym: angulus iridocornealis, angle of iris, angulus iridis, filtration angle. (05 Mar 2000) |
| anteflexion of iris | Rarely used term for an iris that is in part, folded forward after a severe iridodialysis so that the pigmented layer faces forward. (05 Mar 2000) |