| pericardial tap | Needle drainage of the pericardium, usually accompanied by placement of an indwelling catheter for continuing drainage. Synonym: pericardial tap, pericardiocentesis. (05 Mar 2000) |
|---|---|
| pericardial veins | Several small veins from the pericardium emptying into the brachiocephalic veins or superior vena cava. Synonym: venae pericardiacae. (05 Mar 2000) |
| pericardial villi | Minute filiform projections from the surface of the serous pericardium. Synonym: villi pericardiaci. (05 Mar 2000) |
| pericardial window techniques | Surgical construction of an opening or window in the pericardium. It is often called subxiphoid pericardial window technique. (12 Dec 1998) |
| oblique pericardial sinus | The recess in the pericardial cavity posterior to the base of the heart bounded laterally by the pericardial reflections on the pulmonary veins and inferior vena cava, and posteriorly by the pericardium overlying the anterior aspect of the oesophagus. Synonym: sinus obliquus pericardii, oblique sinus of pericardium. (05 Mar 2000) |
| allantoenteric diverticulum | An endoderm-lined outpouching of the hindgut (in humans, the yolk sac of a very young embryo) representing the primordium of the allantois; in most amniotes, it grows into the extraembryonic celom; in humans, the distal part of the allantoic lumen is rudimentary, not extending beyond the body stalk. Synonym: allantoenteric diverticulum. (05 Mar 2000) |
| allantoic diverticulum | An endoderm-lined outpouching of the hindgut (in humans, the yolk sac of a very young embryo) representing the primordium of the allantois; in most amniotes, it grows into the extraembryonic celom; in humans, the distal part of the allantoic lumen is rudimentary, not extending beyond the body stalk. Synonym: allantoenteric diverticulum. (05 Mar 2000) |
| Rathke's diverticulum | A tubular outgrowth of ectoderm from the stomodeum of the embryo; it grows dorsad toward the infundibular process of the diencephalon, around which it forms a cup-like mass, giving rise to the pars distalis and pars juxtaneuralis of the hypophysis. Synonym: craniopharyngeal canal, hypophyseal pouch, Rathke's diverticulum, Rathke's pocket, Rathke's pouch. (05 Mar 2000) |
| ventricular diverticulum | A congenital outpouching of the right or left ventricle. (05 Mar 2000) |
| vesical diverticulum | A diverticulum of the bladder wall; may be either true or false type. (05 Mar 2000) |
| meckel diverticulum | <radiology> Rule of secondarys, 2 cm wide, 2 feet from I-C valve, males 2:1, 2% of population, antimesenteric (unlike duplication cyst), with or without ectopic gastric/pancreatic tissue see: Meckel scan (12 Dec 1998) |
| meckel's diverticulum | An out-pouching of the small bowel (ileum). Present in about 2% of people and usually occurs about 2 feet before the junction with the colon. Can be lined by stomach-type mucosa and ulcerate, perforate, or cause small bowel obstruction. (12 Dec 1998) |
| cervical diverticulum | A diverticulum in the neck derived from retention of part of one of the pharyngeal pouches (endodermal) or branchial grooves (ectodermal) of the embryo. (05 Mar 2000) |
| metanephric diverticulum | An outgrowth from the caudal portion of the mesonephric duct on either side, which grows cephalodorsally to make contact with the masses of metanephrogenous tissue (nephric blastemas) that give rise to the epithelial lining of the ureter and of the pelvis and the collecting ducts of the kidney. (05 Mar 2000) |
| Pertik's diverticulum | An abnormally deep recessus pharyngeus. (05 Mar 2000) |