lymph node (redirected from Lymphoid nodules)

node (nōd) a small mass of tissue in the form of a swelling, knot, or protuberance, either normal or pathological.no´dal

---

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.

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.

Mentioned in: Chronic Fatigue Syndrome, Lumpectomy, Lung Cancer, Non-Small Cell

---

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),
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´ylr),
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

large vessels carrying lymph from smaller collecting vessels. Include thoracic duct, right lymphatic 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 Lymphoid nodules.

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.