| lymphoblastosis | The presence of lymphoblasts in the peripheral blood; sometimes used as a synonym for acute lymphocytic leukaemia. Origin: Lymphoblast + G. -osis, condition (05 Mar 2000) |
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| lymphocele | Cystic mass containing lymph from diseased lymphatic channels or following surgical trauma or other injury. (12 Dec 1998) |
| lymphocerastism | The process of formation of cells in the lymphocytic series. Origin: Lympho-+ G. Kerastos, mixed, mingled (05 Mar 2000) |
| lymphocinesis | 1. Circulation of lymph in the lymphatic vessels and through the lymph nodes. 2. Movement of endolymph in the saemicircular canals of the inner ear. Synonym: lymphocinesis, lymphocinesia. Origin: Lympho-+ G. Kinesis, movement (05 Mar 2000) |
| lymphocryptovirus | A genus of the family herpesviridae, subfamily gammaherpesvirinae, consisting of viruses similar to the type species human herpes virus 4 (herpes virus 4, human), better known as the epstein-barr virus. (12 Dec 1998) |
| lymphocyst | Synonym: lymphocele. Origin: Lympho-+ G. Kystis, bladder (05 Mar 2000) |
| lymphocytapheresis | Separation and removal of lymphocytes from the withdrawn blood, with the remainder of the blood retransfused into the donor. Synonym: lymphapheresis. Origin: Lymphocyte + G. Aphairesis, a withdrawal (05 Mar 2000) |
| lymphocyte | <haematology> White cell of the blood that are derived from stem cells of the lymphoid series. Two main classes are recognised, T and B lymphocytes, the latter responsible (when activated) for production of antibody, the former subdivided into subsets (helper, suppressor, cytotoxic T-cells) and responsible both for cell-mediated immunity and for stimulating B-cells. (18 Nov 1997) |
| lymphocyte activation | <haematology> The change in morphology and behaviour of lymphocytes exposed to a mitogen or to an antigen to which they have been primed. The result is the production of lymphoblasts, cells that are actively engaged in protein synthesis and that divide to form effector populations. Should not be confused with transformation of the type associated with oncogenic viruses and activation is therefore perhaps a better term. (18 Nov 1997) |
| lymphocyte cooperation | T-cell enhancement of the B-cell response to thymic-dependent antigens. (12 Dec 1998) |
| lymphocyte count | A count of the number of lymphocytes in the blood. (12 Dec 1998) |
| lymphocyte depletion | Immunosuppression by reduction of circulating lymphocytes or by T-cell depletion of bone marrow. The former may be accomplished in vivo by thoracic duct drainage or administration of antilymphocyte serum. The latter is performed ex vivo on bone marrow before its transplantation. (12 Dec 1998) |
| lymphocyte function associated antigen | A member of the integrin family that is expressed on all leukocytes and binds to ICAM-1 and ICAM-2 on a variety of cells. (05 Mar 2000) |
| lymphocyte function-associated antigen-1 | A heterodimer molecule widely expressed on cells of haematopoietic origin. Cd11a antigen comprises the alpha chain and the CD18 antigen (antigens, CD18) the beta chain. Lfa-1 is a major receptor of T-cells, B-cells, and granulocytes. It mediates the leukocyte adhesion reactions underlying cytolytic conjugate formation, helper T-cell interactions, and antibody-dependent killing by natural killer cells and granulocytes. Intracellular adhesion molecule-1 (icam-1) has been defined as a ligand for lfa-1. (12 Dec 1998) |
| lymphocyte lymphocyte | A type of non-granular antibodies. (09 Oct 1997) |
| intercostal lymph nodes | One or two small nodes located posteriorly in each intercostal space; they receive lymph from the parietal pleura, intercostal space, and posterior body wall; the nodes in the upper spaces empty into the thoracic duct; the nodes in the lower spaces form a descending intercostal trunk that opens into the cisterna chyli. Synonym: nodi lymphatici intercostales. (05 Mar 2000) |
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| interiliac lymph nodes | Several lymph nodes located between the external and internal iliac arteries and the obturator artery; these nodes are considered by some to be part of the medial external iliac nodes. Synonym: nodi lymphatici interiliaci. (05 Mar 2000) |
| intermediate lacunar lymph node | A lymph node of the external iliac group located between the external iliac artery and vein at the vascular lacuna. Synonym: nodus lacunaris intermedius, intermediate lacunar node. (05 Mar 2000) |
| intermediate lumbar lymph nodes | The chain of lymph nodes located between the aorta and the inferior vena cava. Synonym: nodi lymphatici lumbales intermedii, lumbar lymph nodes. (05 Mar 2000) |
| internal iliac lymph nodes | Nodes that lie along the internal iliac artery and its branches; they receive lymph from the pelvic viscera, the gluteal region, and the deep parts of the perineum, and send efferent vessels to the common iliac nodes. Synonym: nodi lymphatici iliaci interni. (05 Mar 2000) |
| interpectoral lymph nodes | Small lymph nodes located between the pectoralis major and minor muscles; they receive lymph from the muscles and the mammary gland, and deliver lymph to the axillary lymphatic plexus. Synonym: nodi lymphatici interpectorales. (05 Mar 2000) |
| intraglandular deep parotid lymph nodes | Small lymph nodes of the deep parotid group lying within the parotid gland. Synonym: nodi lymphatici parotidei intraglandulares, intraglandular parotid lymph nodes. (05 Mar 2000) |
| intraglandular parotid lymph nodes | Small lymph nodes of the deep parotid group lying within the parotid gland. Synonym: nodi lymphatici parotidei intraglandulares, intraglandular parotid lymph nodes. (05 Mar 2000) |
| intravascular lymph | Lymph within the lymphatic vessels, in contrast to intercellular lymph and lymph that has exuded from the vessels. (05 Mar 2000) |
| obturator lymph nodes | Nodes of the internal iliac group located along the obturator artery. Synonym: nodi lymphatici obturatorii. (05 Mar 2000) |
| occipital lymph nodes | One or two small nodes along the occipital vessels close to the trapezius muscle that receive afferents from the posterior scalp and drain into the superior deep cervical nodes. Synonym: nodi lymphatici occipitales. (05 Mar 2000) |
| thyroid lymph nodes | Nodes of the anterior deep cervical group located around the thyroid gland; they drain into the lateral deep cervical group. Synonym: nodi lymphatici thyroidei. (05 Mar 2000) |
| eggshell lymph node calcification | <radiology> Silicosis, sarcoid, treated Hodgkin's lymphoma (12 Dec 1998) |
| tissue lymph | True lymph, i.e., lymph derived chiefly from fluid in tissue spaces (in contrast to blood lymph). (05 Mar 2000) |
| tracheal lymph nodes | Nodes along the sides of the trachea in the neck and in the posterior mediastinum; receive drainage of superior (and inferior) tracheobranchial (nodes, trachea and oesophagus); drain to bronchomediastinal lymphatic trunk(s), thoracic duct. Synonym: nodi lymphatici paratracheales, tracheal lymph nodes. (05 Mar 2000) |