node

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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.
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.
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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

node

(nōd), [TA] Avoid using the simple word node in the sense of atrioventricular node or lymph node unless the meaning is clear from the context.
1. A knob or nodosity; a circumscribed swelling; in anatomy, a circumscribed mass of tissue.
2. A circumscribed mass of differentiated tissue.
3. A knuckle, or finger joint.
Synonym(s): nodus [TA]
[L. nodus, a knot]
Farlex Partner Medical Dictionary © Farlex 2012

node

(nōd)
n.
1.
a. A knob, knot, protuberance, or swelling.
b. Medicine A small, well-defined mass of tissue that is either normal or pathological, as a lymph node or a node at an arthritic joint.
2.
a. A point or area where two lines, paths, or parts intersect or branch off: "The nodes, or branching points, are usually demarcated by sets of one or more new, evolutionary characters that typify all taxa" (Pat Shipley).
b. A focal point or a point of interaction: "Inside the hospital, she became a node of gossip, despite being unable to communicate in the usual way" (Oliver Sacks).
3.
a. Botany The point on a stem where a leaf is attached or has been attached; a joint.
b. See knot1.
4. Physics A point or region of virtually zero amplitude in a wave or periodic system.
5. Mathematics The point at which a continuous curve crosses itself.
6. Computers A terminal in a computer network.
7. Astronomy
a. Either of two diametrically opposite points at which the orbit of a planet intersects the ecliptic.
b. Either of two points at which the orbit of a satellite intersects the orbital plane of a planet.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

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.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

node

(nōd) [TA]
1. A knob or nodosity; a circumscribed swelling.
2. anatomy A circumscribed mass of differentiated tissue, especially a lymph node.
Synonym(s): nodus.
[L. nodus, a knot]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

node

that part of a plant stem where leaves are attached or may develop from buds. See also INTERNODE.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

node

(nōd) [TA]
1. A knob or nodosity; a circumscribed swelling; in anatomy, a circumscribed mass of tissue.
2. A circumscribed mass of differentiated tissue.
[L. nodus, a knot]
Medical Dictionary for the Dental Professions © Farlex 2012

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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