node (nōd) a small mass of tissue in the form of a swelling, knot, or protuberance, either normal or pathological.no´dal
Lymph node
lymph node
lymph [limf]
atrioventricular node , AV node (AVN) a collection of Purkinje fibers beneath the endocardium of the right atrium, continuous with the atrial muscle fibers and atrioventricular bundle; it receives the cardiac impulses from the sinoatrial node and passes them on to the ventricles.
Bouchard's nodes cartilaginous and bony enlargements of the proximal interphalangeal joints of the fingers in degenerative joint disease.
Dürck's nodes granulomatous perivascular infiltrations in the cerebral cortex in trypanosomiasis.
Flack's node sinoatrial n.
Heberden's nodes small hard nodules, usually at the distal interphalangeal joints of the fingers, formed by calcific spurs of the articular cartilage and associated with osteoarthritis.
Hensen's node primitive node.
Keith's node , Keith-Flack node sinoatrial n.
lymph node any of the accumulations of lymphoid tissue organized as definite lymphoid organs along the course of lymphatic vessels, consisting of an outer cortical and an inner medullary part; they are the main source of lymphocytes of the peripheral blood and, as part of the reticuloendothelial system, serve as a defense mechanism by removing noxious agents, e.g., bacteria and toxins, and probably play a role in antibody formation. 
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Lymph node (nodus lymphoideus).
Osler's nodes small, raised, swollen, tender areas, bluish or sometimes pink or red, occurring commonly in the pads of the fingers or toes, in the thenar or hypothenar eminences, or the soles of the feet; they are practically pathognomonic of subacute bacterial endocarditis.
primitive node a mass of cells at the cranial end of the primitive streak in the early embryo.
nodes of Ranvier constrictions of myelinated nerve fibers at regular intervals at which the myelin sheath is absent and the axon is enclosed only by Schwann cell processes.
Schmorl's node an irregular or hemispherical bone defect in the upper or lower margin of the body of a vertebra.
sentinel node
1. the first lymph node to receive drainage from a tumor; used to determine whether there is lymphatic metastasis in certain types of cancer.
2. signal n.
signal node an enlarged supraclavicular lymph node; often the first sign of a malignant abdominal tumor.
singer's nodes vocal cord nodules.
sinoatrial node , sinuatrial node, sinus node a microscopic collection of atypical cardiac muscle fibers (Purkinje fibers) at the junction of the superior vena cava and right atrium, in which the cardiac rhythm normally originates and which is therefore called the cardiac pacemaker.
teacher's nodes vocal cord nodules.
Troisier's node , Virchow's node signal n.
| lymph node n. Any of the small, oval or round bodies, located along the lymphatic vessels, that supply lymphocytes to the bloodstream and remove bacteria and foreign particles from the lymph. Also called lymph gland, lymphoglandula, lymphonodus. |
Lymph node
A small mass of tissue in the form of a knot or protuberance. Lymph nodes are the primary sources of lymph fluid, which serve in the body's defense by removing toxic fluids and bacteria.
lymph node
Etymology: L, lympha + nodus, knot
one of the many small oval structures that filter the lymph and fight infection and in which lymphocytes, monocytes, and plasma cells are formed. The lymph nodes are of different sizes, some as small as pinheads, others as large as lima beans. Each node is enclosed in a capsule, is composed of a lighter-colored cortical part and a darker medullary part, and consists of closely packed lymphocytes, reticular connective tissue laced by trabeculae, and three kinds of sinuses: subcapsular, cortical, and medullary. Lymph flows into the node through afferent lymphatic vessels that open into the subcapsular sinuses. Most lymph nodes are clustered in areas such as the mouth, the neck, the lower arm, the axilla, and the groin. The lymphatic network and nodes of the breast are especially crucial in the diagnosis and treatment of breast cancer. Also called lymph gland.
lymph [limf]
a transparent, usually slightly yellow, often opalescent liquid found within the lymphatic vessels, and collected from tissues in all parts of the body and returned to the blood via the lymphatic system. It is about 95 per cent water; the remainder consists of plasma proteins and other chemical substances contained in the blood plasma, but in slightly smaller percentage than in plasma. Its cellular component consists chiefly of lymphocytes.
The body contains three main kinds of fluid: blood, tissue fluid, and lymph. The blood consists of the blood cells and platelets, the plasma, or fluid portion, and a variety of chemical substances dissolved in the plasma. When the plasma, without its solid particles and some of its dissolved substances, seeps through the capillary walls and circulates among the body tissues, it is known as tissue fluid. When this fluid is drained from the tissues and collected by the lymphatic system, it is called lymph. The lymphatic system eventually returns the lymph to the blood, where it again becomes plasma. This movement of fluid through the body is described under circulatory system.
The body contains three main kinds of fluid: blood, tissue fluid, and lymph. The blood consists of the blood cells and platelets, the plasma, or fluid portion, and a variety of chemical substances dissolved in the plasma. When the plasma, without its solid particles and some of its dissolved substances, seeps through the capillary walls and circulates among the body tissues, it is known as tissue fluid. When this fluid is drained from the tissues and collected by the lymphatic system, it is called lymph. The lymphatic system eventually returns the lymph to the blood, where it again becomes plasma. This movement of fluid through the body is described under circulatory system.
lymph node any of the accumulations of lymphoid tissue organized as definite lymphoid organs along the course of lymphatic vessels (see accompanying illustration); they consist of an outer cortical and an inner medullary part. Lymph nodes are the main source of lymphocytes of the peripheral blood and, as part of the reticuloendothelial system, serve as a defense mechanism by removing noxious agents such as bacteria and toxins, and probably play a role in antibody formation. Sometimes called, incorrectly, lymph gland. Called also lymph or lymphatic follicle and lymphatic nodule.
Location of clusters of superficial lymph nodes. From Applegate, 2000.
node [nōd]
a small mass of tissue in the form of a swelling, knot, or protuberance, either normal or pathological. adj., adj no´dal.
node of Aschoff and Tawara atrioventricular node.
atrioventricular node (AV node) a collection of cardiac fibers at the base of the interatrial septum that transmits the cardiac impulse initiated by the sinoatrial node.
Bouchard's n's cartilaginous and bony enlargements of the proximal interphalangeal joints of the fingers in degenerative joint disease; such nodes on the distal joints are called Heberden's nodes.
Delphian node a lymph node encased in the fascia in the midline just above the thyroid isthmus, so called because it is exposed first at operation and, if diseased, is indicative of disease of the thyroid gland.
Flack's node sinoatrial node.
Heberden's n's nodular protrusions on the phalanges at the distal interphalangeal joints of the fingers in osteoarthritis. Similar nodes on the proximal joints are called bouchard's nodes.
Comparison of Heberden's nodes (seen in patients with osteoarthritis) with Bouchard's nodes (seen in patients with rheumatoid arthritis). From Copstead and Banasik, 2000.
hemal n's nodes with a rich content of erythrocytes within sinuses, found near large blood vessels along the ventral side of the vertebrae and near the spleen and kidneys in various mammals, especially ruminants, having functions probably like those of the spleen; their presence in humans is doubtful.
Keith's node (Keith-Flack node) sinoatrial node.
Legendre's n's Bouchard's nodes.
lymph node see lymph node.
Osler's n's small, raised, swollen, tender areas, bluish or sometimes pink or red, due to inflammation around the site of lodgement of small infected emboli in distal arterioles; they occur commonly in the pads of the fingers or toes, in the palms, or in the soles and are practically pathognomonic for subacute bacterial endocarditis.
Parrot's n's bony nodes on the outer table of the skull of infants with congenital syphilis.
n's of Ranvier constrictions of myelinated nerve fibers at regular intervals at which the myelin sheath is absent and the axon is enclosed only by Schwann cell processes.
SA node sinoatrial node.
Schmorl's node an irregular or hemispherical bone defect in the upper or lower margin of the body of a vertebra into which the nucleus pulposus of the intervertebral disk herniates.
sentinel node
1. the first lymph node to receive drainage from a tumor; used to determine whether there is lymphatic metastasis in certain types of cancer. If this node is negative for malignancy, others “upstream” from it are usually also negative.
2. signal n.
signal node an enlarged supraclavicular lymph node; often the first sign of a malignant abdominal tumor.
singer's n's vocal cord nodules.
sinoatrial node a collection of atypical muscle fibers in the wall of the right atrium where the rhythm of cardiac contraction is usually established; therefore also referred to as the pacemaker of the heart. Called also SA node.
syphilitic node a swelling on a bone due to syphilitic periostitis.
node of Tawara atrioventricular node.
teacher's n's vocal cord nodules.
Troisier's node (Virchow's node) sentinel node.
lymph
(limf),
n a thin opalescent fluid originating in organs and tissues of the body that circulates through the lymphatic vessels and is filtered by the lymph nodes.
n a thin opalescent fluid originating in organs and tissues of the body that circulates through the lymphatic vessels and is filtered by the lymph nodes.
lymph node,
n one of the many small oval structures that filter the lymph and fight infection, and in which are formed lymphocytes, monocytes, and plasma cells. See also each of the individual lymph nodes of the head and neck as they are listed.
lymph nodes, accessory,
n the deep cervical lymph nodes situated near the accessory nerve.
lymph nodes, anterior jugular,
n a type of superficial cervical lymph node located along the anterior jugular vein.
lymph nodes, auricular
(ôrik´y
lr),
n the superficial lymph nodes located surrounding the ear.
lr), n the superficial lymph nodes located surrounding the ear.
lymph
a transparent, usually slightly yellow, often opalescent liquid found within the lymphatic vessels, and collected from tissues in most parts of the body and returned to the blood via the lymphatic system. It is about 95% water; the remainder consists of plasma proteins and other chemical substances contained in the blood plasma, but in a slightly smaller percentage than in plasma. Its cellular component consists chiefly of lymphocytes.
lymph duct
lymph heart
a muscular dilatation in a lymph vessel, capable of contraction and moving lymph along the vessel. Seen in embryos and lower vertebrates.
lymph node
any of the accumulations of lymphoid tissue organized as definite lymphoid organs along the course of lymphatic vessels, consisting of an outer cortical and an inner medullary part; they are the main source of lymphocytes of the peripheral blood and, as part of the reticuloendothelial system, serve as a defense mechanism by removing noxious agents, e.g. bacteria and toxins, and play a critical role in antibody formation. Sometimes called, incorrectly, lymph glands.
lymph node abscess
hard, usually cold swellings containing pus; secondary to primary lesion in node's drainage area; a feature of some chronic infections, e.g. tuberculosis, caseous lymphadenitis of sheep; specific nodes may cause specific syndromes, e.g. retropharyngeal nodes.
lymph node hyperplasia
increase in size due to increase in number of normal cells but with preservation of natal architecture.
lymph node hypoplasia
occurs in cattle and causes antenatal edema of the fetus, leading to dystocia in many cases. The calves are not viable.
lymph nodule
germinal centers in lymph nodes which produce lymphocytes. Called also lymphatic or lymphoid nodule.
periarteriolar lymph sheath (PALS)
the white pulp, heavily populated with T lymphocytes, that surrounds arteries in the spleen.
lymph tissue
see lymphoid tissue.
node
pl. nodi; a small mass of tissue in the form of a swelling, knot or protuberance, either normal or pathological.
node of Aschoff and Tawara
atrioventricular node.
cutaneous node
an elevated, solid lump, without a necrotic center, about 0.5 inch diameter, caused by acute or chronic inflammation, with an unbroken surface. Called also cutaneous nodule.
Flack's node
see sinoatrial node.
hemal n's
see hemal node.
Keith's node, Keith-Flack node
see sinoatrial node.
lymph node
see lymph node.
n's of Ranvier
constrictions of myelinated nerve fibers at regular intervals of about 1 mm at which the myelin sheath is absent and theaxon is enclosed only by Schwann cell processes.
sinoatrial (S-A) node
see sinoatrial node.
node of Tawara
atrioventricular node.
Patient discussion about lymph node.
Q. tender protuding lymph node lump rt. arm pit aprox. 1/2" dia. any concerns or recommend treatment necessary?
A. lymph nodes can flare up any time you get infected in the armpit and all the area that it drains. i had it several times and it went away in the same manner that it came. i think that sometimes it caused because of a blockade done by deodorant. so i try to use this Chinese salt stone that doesn't contain aluminum.
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