| ann | fib annulus fibrosus |
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| AF | Annulus fibrosus |
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| MAC | Mitral annulus calcification |
| TA | tricuspid annulus |
| annulus lymphaticus cardiae | A group of lymph nodes surrounding the cardia of the stomach. Synonym: annulus lymphaticus cardiae, cardiac lymphatic ring. (05 Mar 2000) |
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| sphincter constrictor cardiae | A sphincter supposedly present at the oesophagogastric junction; this is in fact an extrinsic sphincter formed by the surrounding musculature of the oesophageal hiagus of the right crus of the diaphragm; causes a normally-occuring constriction at the oesophagogastric junction observable with a barium swallow. Synonym: sphincter constrictor cardiae. (05 Mar 2000) |
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| plexus lymphaticus | A plexus of lymphatic capillaries, usually without valves, that opens into one or more larger lymphatic vessels. Synonym: plexus lymphaticus. (05 Mar 2000) |
| status lymphaticus | Old term for a syndrome of supposed enlargement of the thymus and lymph nodes in infants and young children, formerly believed to be associated with unexplained sudden death; it was also erroneously believed that pressure of the thymus on the trachea might cause death during anaesthesia. Prominence of these structures is now considered normal in young children, including those who have died suddenly without preceding illnesses that might lead to atrophy of lymphoid tissue. See: sudden infant death syndrome. Synonym: status lymphaticus, status thymicus. (05 Mar 2000) |
| nevus lymphaticus | A cutaneous lymphangioma. (05 Mar 2000) |
| nodulus lymphaticus | Lymphatic follicle, one of the spherical masses of lymphoid cells, frequently having a more lightly staining centre. See: solitary lymphatic follicles, Peyer's patches. Synonym: folliculus lymphaticus, lymph nodule, nodulus lymphaticus. (05 Mar 2000) |
| nodus lymphaticus | Synonym: lymph node. Origin: Lympho-+ L. Nodus, node (05 Mar 2000) |
| nodus lymphaticus arcus venae azygos | A lymph node of the posterior mediastinal group located adjacent to the arch of the azygos vein. Synonym: nodus lymphaticus arcus venae azygos. (05 Mar 2000) |
| ductus lymphaticus dexter | One of the two terminal lymph vessels, a short trunk, about 2 cm in length, formed by the union of the right jugular lymphatic vessel and vessels from the lymph nodes of the right superior limb, thoracic wall, and both lungs; it lies on the right side of the root of the neck and empties into the right brachiocephalic vein. Synonym: ductus lymphaticus dexter, ductus thoracicus dexter. (05 Mar 2000) |
| folliculus lymphaticus | Lymphatic follicle, one of the spherical masses of lymphoid cells, frequently having a more lightly staining centre. See: solitary lymphatic follicles, Peyer's patches. Synonym: folliculus lymphaticus, lymph nodule, nodulus lymphaticus. (05 Mar 2000) |
| lupus lymphaticus | A congenital nevoid lesion consisting of a circumscribed group of tense lymph vesicles. Synonym: lupus lymphaticus, lymphangiectodes, lymphangioma capillare varicosum, lymphangioma superficium simplex. (05 Mar 2000) |
| annulus | Ring like structure, adj. Annulate. (18 Nov 1997) |
| annulus abdominalis | The opening in the transversalis fascia through which the ductus deferens (or round ligament in the female) and gonadal vessels enter the inguinal canal. Located midway between anterior superior iliac spine and pubic tubercle, it is bounded medially by the lateral umbilical ligament (inferior epigastric vessels) and inferiorly by the inguinal ligament. Indirect inguinal hernias exit the abdominal cavity via the deep inguinal ring Synonym: annulus inguinalis profundus, abdominal ring, annulus abdominalis, internal inguinal ring. (05 Mar 2000) |
| annulus ciliaris | <anatomy> Tissue that includes the group of muscles that act on the eye lens to produce accommodation and the arterial circle of the iris. The inner ciliary epithelium is continuous with the pigmented retinal epithelium, the outer ciliary epithelium secretes the aqueous humour. (18 Nov 1997) |
| annulus conjunctivae | A narrow ring at the junction of the periphery of the cornea with the conjunctiva. Synonym: annulus conjunctivae. (05 Mar 2000) |
| annulus femoralis | The superior opening of the femoral canal, bounded anteriorly by the inguinal ligament, posteriorly by the pectineus muscle, medially by the lacunar ligament, and laterally by the femoral vein. Passageway by which many lymphatics from lower limb pass to abdomen. Accommodates enlargement of femoral vein in Valsalva manoeuvre. Often occupied by a lymph node (Cloquet's) and is the site of femoral hernias. Synonym: annulus femoralis, crural ring. (05 Mar 2000) |
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