node (nōd) a small mass of tissue in the form of a swelling, knot, or protuberance, either normal or pathological.no´dal
node
node [nōd]
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.
node (n d)n. 1. A knob, knot, protuberance, or swelling. 2. A protuberant growth or swelling in a tissue. 3. A knuckle or finger joint. |
node
[nōd]
Etymology: L, nodus, knot
1 a small rounded mass.
2 a lymph node.
3 a single computer terminal in a network of terminals and computers.
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.
node (nōd),
n a swelling or protuberance.
node, brown, of hyperparathyroidism,
n a central giant cell lesion of the bone seen in hyperparathyroidism. Its microscopic appearance is similar to giant cell reparative granuloma and giant cell tumor.
node of Ranvier gaps,
n.pl nodes distributed at regularly spaced intervals along a myelinated nerve fiber. The intervals are 1 mm or more in length, and they function essentially as relay stations to facilitate the passage of an impulse.
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.
node
Cardiology An intrinsic pacemaker of the heart, composed of neural tissue See Atrioventricular node, Sinoatrial node Decision-making Any point in a decision tree where choices occur or results assigned See Chance node, Decision node, Outcome node Pathology 1 A circumscribed tissue mass See Heberden's node, Singer's node 2 Lymph node, see there. See Axillary node, Irish's node, Potato node, Sentinel node, Virchow's node.
Patient discussion about 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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