| diverticulum | <anatomy, surgery> A small sac-like structure that sometimes forms in the walls of the intestines, diverticula can trap particles of food (especially small seeds and undigested grains) and become very inflammed and painful (this condition is called diverticulitis). (09 Oct 1997) |
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| duodenal diverticulum | A diverticulum of the duodenum, often of large size, that is occasionally found projecting from the duodenum near the duodenal papilla. (05 Mar 2000) |
| oesophageal diverticulum | Saccular, outward protrusion of all or a portion of the oesophageal wall from the lumen of the oesophagus. (12 Dec 1998) |
| thyroid diverticulum | Thyroglossal diverticulum, the endodermal bud from the floor of the embryonic pharynx; the primordium of the parenchyma of the thyroid gland. (05 Mar 2000) |
| tracheobronchial diverticulum | The endodermal lung primordium which will give rise to the epithelial lining of the respiratory tract. Synonym: lung bud. (05 Mar 2000) |
| traction diverticulum | A diverticulum formed by the pulling force of contracting bands of adhesion, occurring mainly in the distal oesophagus, from tuberculous hilar or mediastinal lymphadenitis. (05 Mar 2000) |
| epiphrenic diverticulum | A diverticulum which originates just above the cardioesophageal junction and usually protrudes to the right side of the lower meadiastinum. (05 Mar 2000) |
| true diverticulum | A term denoting a diverticulum that includes all the layers of the wall from which it protrudes. (05 Mar 2000) |
| false diverticulum | <surgery> A diverticulum of the intestine that passes through a defect in the muscular wall of the gut and thus does not include a layer of muscle in its wall. (05 Mar 2000) |
| Zenker's diverticulum | <pathology> Herniation of the mucosa of the oesophagus through a defect in the wall of the oesophagus. The location is usually in the upper one-third of the oesophagus. (12 Nov 1997) |
| Kommerell's diverticulum | The diverticulum at the origin of some aberrant right subclavian arteries resulting from incomplete arch agenesis. (05 Mar 2000) |
| urethral diverticulum | A sac-like outpouching of the urethral wall, either from a congenital defect or, more commonly, as a result of chronic penetrating inflammation. (05 Mar 2000) |
| laryngotracheal diverticulum | A diverticulum from the floor of the caudal end of the pharynx which gives rise to the epithelium and glands of the larynx, trachea, bronchi, and lungs. Once this diverticulum separates from the foregut, it is referred to as a tube. (05 Mar 2000) |