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Topic: Lymphoid

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	LLU - LYMPHOID TISSUE AND ORGANS
		Lymphoid cells in the reaction center and the mantle are largely B-lymphocytes.
		Lymphoid tissue - a reticulum of reticular fibers and associated reticular cells with lymphoid cells filling the spaces.
		Lymph nodes and spleen - B-cells are concentrated in cortical nodules of lymph nodes and at the periphery of the periarterial lymphoid sheath in the spleen.
	www.llu.edu /llu/medicine/anatomy/glossary/syllabus/LYMPH.htm (2247 words)

	Lymphoid System
		An infiltration of the lamina propria of mucous membranes in the alimentary canal (Peyer's patches) and respiratory tract (tonsils).
		Lymphoid tissue located beneath the mucosal epithelial lining of the respiratory and digestive systems protects the body against pathogens that may enter the body via the mucosa.
		The epithelium of the palatine and lingual tonsils forms deep crypts into the lymphoid tissue, and the resulting increase of the surface area is one way to facilitate the contact of antigens with the immune cells.
	faculty.ucc.edu /biology-potter/lymphoid_system.htm (974 words)

	Structural normalization of the lymphoid tissue asymptomatic HIV-infected patients after 48 weeks potent antiretroviral ... (Site not responding. Last check: 2007-10-19)
		In the present study, a sampling bias is an unlikely reason for the observed changes, as the severity of baseline tonsil lymphoid tissue injury was quite uniform and the amount of lymphoid tissue in the baseline and follow-up biopsies was similar.
		Lymphoid tissue present in the tonsil biopsies was sufficient to allow histological evaluation of representative B and T areas and precise measurement of the area occupied by B-dependent zones and immunostained cell quantification in at least 10 high power microscopic fields of T-dependent zones.
		The regeneration of lymphoid tissue histology reported here is caused, at least partly, by the repopulation of the lymphoid tissue with immune cells and the recovery of the FDC network.
	www.natap.org /2001/dec/122801_1.htm (2165 words)

	Blue Histology - Lymphoid Tissues I
		Lymphoid (or lymphatic) tissues, which mainly consist of dense accumulations of lymphocytes, are widely distributed in the body.
		Lymphoid tissues are typically located at sites that provide a possible route of entry of pathogens and/or sites that are liable to infections.
		Lymphoid organs may be defined as anatomical "entities" which consists chiefly of lymphoid tissues.
	www.lab.anhb.uwa.edu.au /mb140/CorePages/Lymphoid1/lymph1.htm (1558 words)

	Helicobacter pylori associated gastric diseases and lymphoid tissue hyperplasia in gastric antral mucosa -- Chen et al. ...
		the lymphoid follicles and aggregates was 0.71 (1031 of 1476)
		of lymphoid follicles and aggregates in the gastric antral mucosa
		The significance of lymphoid follicles in the interpretation of gastric biopsy specimens.
	jcp.bmjjournals.com /cgi/content/full/55/2/133 (2972 words)

	Polypoid Nodular Lymphoid Hyperplasia of the Terminal Ileum Archives of Pathology & Laboratory Medicine - Find ...
		Lymphoid hyperplasia may be discovered incidentally, at colonoscopy, or in patients undergoing colectomy, especially in the last few centimeters of the terminal ileum.
		The pathology of lymphoid hyperplasia is quite characteristic, consisting of prominent lymphoid follicles with active germinal centers located in the mucosa and submucosa.
		The clinical significance of lymphoid hyperplasia lies in the possibility of these nodules serving as a nidus for prolapse and intussusception and in the association with immunosuppressive states.
	www.findarticles.com /p/articles/mi_qa3725/is_200410/ai_n9454782 (704 words)

	Rare diseases bullet 13: Non-neoplastic pulmonary lymphoid lesions -- Travis and Galvin 56 (12): 964 -- Thorax
		Lymphoid hyperplasia of the lung and Evans' syndrome in IgA deficiency.
		Immunoblastic lymphoma arising in chronic lymphoid hyperplasia of the pulmonary interstitium.
		Coexistent lymphoid interstitial pneumonia, pernicious anemia, and agammaglobulinemia.
	thorax.bmjjournals.com /cgi/content/full/56/12/964 (3545 words)

	HON Allergy Glossary Gut associated lymphoid tissue (GALT)
		Lymphoid aggregates in the appendix and large intestine.
		Lymphoid tissue accumulating with age in the stomach.
		Diffusely distributed lymphoid cells and plasma cells in the lamina propria of the gut.
	www.hon.ch /Library/Theme/Allergy/Glossary/galt.html (78 words)

	SECONDARY LYMPHOID ORGANS, Art Anderson's Immunology Lecture Notes
		A "cortex" and "medulla" is distinguishable in histological preparations by the relative density of small lymphoid cells contained in the reticular matrix.
		The mucosal lymphatic tissues are nonencapsulated submucosal lymphoid nodules and diffuse lymphocytic infiltrates in the submucosa of intestinal and respiratory tracts.
		Cells retaining germline VH/VL and Fc genes are consistently recovered from mucosal (and splenic) lymphoid follicles, giving rise to suggestions that diversification of the immunoglobulin genes in a renewable early B-cell population may be an additional important function of lymphoid follicles in peripheral tissues like the spleen and mucosa associated lymphoid tissues.
	www.geocities.com /artnscience/peripheral-lt.html (7368 words)

	Ectopic lymphoid neogenesis in psoriatic arthritis.
		Ectopic lymphoid neogenesis (LN) occurs in rheumatoid synovium where it is postulated to drive local antigen-dependent B cell development and autoantibody production.
		We aimed to investigate whether these phenomena occur in psoriatic arthritis (PsA) synovium, where autoantibodies have not been described and the organization and function of B cells is not clear, and to analyze their clinical correlates.
		Lymphoid aggregates of variable size were observed in 25 of 27 PsA synovial tissues.
	journals.aol.com /patoco2/DisordersoftheLymphSystem/entries/2007/01/16/ectopic-lymphoid-neogenesis-in-psoriatic-arthritis./1360 (375 words)

	LLU: Medicine: Anatomy: Histology Mentor : Lymphoid Tissue and Organs
		Lymphoid tissues, sites with large numbers of lymphocytes, vary in their degree of organization from diffuse concentrations of lymphocytes to highly structured organs.
		Mucosa-associated lymphoid tissue (MALT) consists of large numbers of lymphocytes, plasma cells and macrophages in the lamina propria of G.I., respiratory and genitourinary tracts, especially near glands.
		Medulla - medullary cords of lymphoid tissue containing mostly B cells and plasma cells are separated from connective tissue trabeculae by medullary sinuses.
	www.llu.edu /llu/medicine/anatomy/glossary/syllabus/lymph.html (3071 words)

	[No title]
		In addition to lymphocytes, lymphoid tissues typically include a reticular con nective tissue stroma in whose meshwork lymphocytes, macrophages, and antigen-presenting cells are suspended.
		In central lymphoid organs (thymus, bone marrow, bursa of Fabricius fin birdsl), lymphocyte production is antigen-independent and supplies uncommitted T lymphocyte (thymus) or B lymphocyte (bone marrow, bursa) precursors that later move to peripheral organs and tissues.
		Lymphoid functions are all directed toward a single objective: antigen disposal, This involves 2 major mechanisms.
	www.loyno.edu /~chood/histnoteslymph.html (6252 words)

	Blue Histology - Lymphoid Tissues II
		The tonsils and Peyer's patches are large accumulations of lymphoid tissue with associated specialisations of the epithelium.
		The tonsils are accumulations of lymphoid tissue surrounding the openings of the digestive and respiratory tracts.
		Extensive areas of lymphoid tissue are alway present in the appendix, but domes and specialised sections of epithelium may not.
	www.lab.anhb.uwa.edu.au /mb140/CorePages/Lymphoid2/lymph2.htm (1921 words)

	Michigan Veterinary Specialists - Acute Lymphoid Leukemia
		Lymphoid leukemias are rare malignant cancers that originate from the white blood cells in the bone marrow.
		Acute lymphoid leukemias have immature (blast) cells in the blood stream and/or bone marrow.
		Lymphoid leukemia can be classified by whether they appear in the blood stream or only appear in the bone marrow.
	www.michvet.com /library/oncology_leukemia_acute.asp (797 words)

	Lab Exercises Lymphoid
		An important accumulation of lymphoid tissue is found in the tonsils.
		This is essentially lymphoid tissue that is embedded in the wall of the pharynx, palate, nasopharynx.
		The white pulp is easy to spot because it is lymphoid tissue with nodules and germinal centers.
	cellbio.utmb.edu /microanatomy/immune_system/lymphoid_tissues.htm (845 words)

	Lymphoid Hyperplasia of the Stomach: Radiographic Findings in Five Adult Patients -- Torigian et al. 177 (1): 71 -- ...
		of lymphoid hyperplasia of the stomach was manifested on a double-contrast
		The significance of lymphoid follicles in the interpretation of gastric biopsy specimens.
		Lymphoid hyperplasia of the stomach presenting as umbilicated polypoid lesions.
	www.ajronline.org /cgi/content/full/177/1/71 (1734 words)

	BioMed Central \| Full text \| Reactive Lymphoid Hyperplasia of the liver in a patient with colon cancer: report of two ...
		Reactive lymphoid hyperplasia (RLH) is reported to occur in the gastrointestinal tract [1], skin [2], lung [3], thyroid [4], orbit [5], and pancreas [6]; however, it is very rarely reported in the liver.
		Reactive lymphoid hyperplasia is recognized as a region that is well demarcated and characterized by hyperplastic lymphoid follicles with reactive germinal centers, which consist of polymorphic and polyclonal cell populations and aggregations of mature lymphocytes, plasma cells, and other types of inflammatory cells [12].
		However, lymphoid infiltration was confined to the area around the nodule, the rest of the hepatic parenchyma was normal, and hepatitis virus markers were negative, suggesting that this lesion was local rather than diffuse.
	www.biomedcentral.com /1471-230X/6/25 (2389 words)

	Lymphoid Interstitial Pneumonitis (Site not responding. Last check: 2007-10-19)
		Lymphoid interstitial pneumonitis (LIP) is a polyclonal polymorphic B-cell lymphoproliferative disorder occurring as a common pulmonary complication in pediatric AIDS patients.
		Lymphoid interstitial pneumonitis (LIP), a frequent pulmonary complication in HIV-infected pediatric patients, is characterized histologically by marked infiltration of lymphoid cells.
		The lymphoid infiltration of PLH was occasionally observed in a circumferential peri-bronchiolar pattern suggesting an association with the prominent linear patterns on the films.
	www.thedoctorsdoctor.com:16080 /diseases/lungs_lip.htm (2872 words)

	[Activation of the major omentum-associated lymphoid tissue in Crohn disease]
		The mucosa associated lymphoid tissues of the intestinal lamina propria or the bronchial mucosa, respectively, represent a separated and well defined immunologic compartment.
		Due to highly specialized functions, subpopulations of lymphoid cells are distributed unevenly between the compartments and unique regulatory mechanisms developed to sustain integrity of mucosal surfaces.
		We conclude that omentum associated lymphoid tissue may be described as an unique immunologic compartment which may play a role in activating events in chronic intestinal inflammation in Crohn's disease.
	www.aegis.com /aidsline/1995/jul/M9570529.html (572 words)

	LYMPHOID SYSTEM (Site not responding. Last check: 2007-10-19)
		These are specialized venules which have markers on their indothelial surface which allow vascular lymphocytes to realize that they are in lymphoid tissue, and might want to exit from the vasculature.
		The large amount of lymphoid tissue is present even with the naked eye, appearing to line about 1/3 of the lumen of the gut.
		This section contains some skeletal muscle, a mucous secretory gland, two lymphoid aggregations with lymphatic nodules, and stretches of stratified squamous epithelium, representing the lining of the pharynx.
	medocs.ucdavis.edu /cha/402/labsyl/01/07.htm (1890 words)

	UpToDate Lymphoid markers and normal lymphoid cell development
		Malignancies of lymphoid cells are hypothesized to be the neoplastic counterparts of subpopulations of normal lymphoid cells by virtue of their cytologic appearance and cell surface immunophenotype.
		The primary lymphoid tissues responsible for the initial generation of B and T lymphocytes are the bone marrow and thymus, respectively.
		Within these lymphoid organs, B and T lymphocytes inhabit highly organized tissues containing some areas in which B- and T- cells are largely segregated, and other areas in which different populations of cells can interact and differentiate.
	patients.uptodate.com /topic.asp?file=lymphoma/7053 (431 words)

	Lymphoid Tissue (Site not responding. Last check: 2007-10-19)
		Lymphoid tissue is found scattered throughout the body in many other organs than lymphoid organs, as the walls of the appendix.
		Although lymphoid tissue is found throughout the body, some organs are specialized structures of the lymphoid system, while others have nothing to do with the system of lymph transport.
		Both the lymphoid organs and the lymphoid tissue help defend the body against disease by filtering out such harmful particles as pathogens and cancer cells from the lymph, tissue fluid, and blood.
	www.innvista.com /HEALTH/anatomy/lymptiss.htm (140 words)

	Ileal-lymphoid-nodular hyperplasia - Brian Deer
		Histologically, discrete polypoid lesions of lymphoid tissue with germinal centres are present.
		“Lymphoid hyperplasia in the terminal ileum is an important differential diagnosis.
		Enlargement of the submucosal lymphoid follicles creates a nodular pattern with regular 2mm defects deforming the thin barium-filled parallel folds that are seen in the contracted ileum.
	briandeer.com /wakefield/ileal-hyperplasia.htm (650 words)

	ACS :: Normal Bone Marrow and Lymphoid Tissue
		The immune system is made up mainly of lymphoid tissue (also known as lymphatic tissue).
		Lymphoid tissue is found in many places throughout the body, including the lymph nodes, the thymus, the spleen, the tonsils and adenoids, and the bone marrow.
		The main cell type that forms lymphoid tissue is the lymphocyte.
	www.cancer.org /docroot/CRI/content/CRI_2_2_1x_Normal_Bone_Marrow_and_Lymphoid_Tissue_AML.asp (385 words)

	Solitary and Aggregated Lymphoid Nodules
		Lymphoid nodules are lymphoid structures common along the gastrointestinal tract, reaching their highest development in the appendix and ileum.
		Lymphoid nodules and lymphocytic infiltrations commonly occur together in the lamina propria and may merge imperceptibly into each other in many areas.
		The nodule may appear as a homogenous mass of lymphocytes (primary nodule) or may be a secondary nodule with a germinal center containing large pale cells surrounded by a dense cortex of small lymphocytes (forming a dark corona or mantle).
	www3.umdnj.edu /histsweb/lab12/lab12solitarynodules.html (462 words)

	eMedicine - Mucosa-Associated Lymphoid Tissue : Article Excerpt by: Sara Grethlein, MD
		The role of the M cells is absorption, transport, processing, and presentation of antigens to subepithelial lymphoid cells.
		Major accumulations of lymphoid tissue are found in the lamina propria of the intestine.
		M cells in the intestinal epithelium overlying Peyer patches allow transport of antigens to the lymphoid tissue beneath it.
	www.emedicine.com /med/byname/mucosa-associated-lymphoid-tissue.htm (602 words)

	Lab Exercises Lymphoid
		An important accumulation of lymphoid tissue is found in the tonsils.
		This is essentially lymphoid tissue that is embedded in the wall of the pharynx, palate, nasopharynx.
		The white pulp is easy to spot because it is lymphoid tissue with nodules and germinal centers.
	www.cytochemistry.net /microanatomy/immune_system/lymphoid_tissues.htm (845 words)

	eMedicine - Mucosa-Associated Lymphoid Tissue : Article by Sara Grethlein, MD
		Lymphoid tissue occupying the lamina propria of digestive, genitourinary, and respiratory mucosae contains an outer, dense-staining region that contains small T lymphocytes (dark zone) and a lighter-staining region that contains large cells (B lymphocytes and plasma cells).
		Reactive lymphoid follicles are present and become infiltrated and colonized by neoplastic lymphocytes.
		Hamzaoui N, Pringault E: Interaction of microorganisms, epithelium, and lymphoid cells of the mucosa-associated lymphoid tissue.
	www.emedicine.com /med/topic3204.htm (5467 words)

	Lymphoid tissue definition - Medical Dictionary definitions of popular medical terms
		Lymphoid tissue: A part of the body's immune system that helps protect it from bacteria and other foreign entities.
		Lymphoid tissue is rich in lymphocytes (and accessory cells such as macrophages and reticular cells).
		The lymphoid tissue includes the lymph nodes, spleen, tonsils and adenoids and the thymus (an organ in the neck that is particularly large during infancy).
	www.medterms.com /script/main/art.asp?articlekey=4224 (174 words)

	Modulating the intestinal immune system: the role of lymphotoxin and GALT organs -- Spahn and Kucharzik 53 (3): 456 -- ...
		GALT organs are the intestinal branch of the organised lymphoid
		Isolated lymphoid follicle formation is inducible and dependent upon lymphotoxin-sufficient B lymphocytes, lymphotoxin beta receptor, and TNF receptor i function.
		Peyer’s patch organogenesis is intact yet formation of B lymphocyte follicles is defective in peripheral lymphoid organs of mice deficient for tumor necrosis factor and its 55-kDa receptor.
	gut.bmjjournals.com /cgi/content/full/53/3/456 (6311 words)

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