Folliculitides
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  Folliculitides



Folliculitides

   Inflammation of follicles, primarily hair follicles.

RELATED TERMS
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Inflammation
A reaction to an injury to the body - by infection, chemicals or physical agents. The symptoms can be - depending on the location of the injury- redness, swelling, heat and pain. The purpose of the inflammation is to dilute and destroy the agent causing the inflammation. To do this, the immune system starts a cascade of actions that causes active cells to gather at the affected location. It is these cells and fluids that cause the redness, swelling, heat and pain.

Follicles
Each month several of these small egg-containing cavities develop on the ovary of an ovulating woman. Each cavity contains a single immature egg; ovulation occurs when a follicle (or sometimes more than one) ruptures and releases an egg.

Hair
A modification of the epidermis found on almost every surface of the body except the palms of the hands, soles of the feet, and the glans penis. It is a filament of KERATIN consisting of a shaft, a root, and a point.



SIMILAR TERMS
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Follicle
The tiny shaft in the skin through which a hair grows, and sebum is excreted from sebaceous glands to the surface of the skin.

Follicle stimulating hormone
A hormone produced by the pituitary gland that stimulates the growth of eggs in the ovaries.

Follicle Stimulating Hormone
A gonadotropic hormone found in the anterior pituitary gland (PITUITARY GLAND, ANTERIOR) of mammals. It stimulates ovarian granulosa cells and testicular Sertoli cells, induces maturation of Graafian follicles in the ovary, and promotes the development of the germinal cells in the testis.

Follicle Stimulating Hormone Receptor
Cell surface proteins that bind FOLLICLE STIMULATING HORMONE with high affinity and trigger intracellular changes influencing the behavior of cells.

Follicle Stimulating Hormone Receptors
Cell surface proteins that bind FOLLICLE STIMULATING HORMONE with high affinity and trigger intracellular changes influencing the behavior of cells.

Follicle Stimulating Hormone Releasing Hormone Receptors
Receptors with a 6-kD protein on the surfaces of cells that secrete LH or FOLLICLE STIMULATING HORMONE, usually in the adenohypophysis. LHRH binds to these receptors, is endocytosed with the receptor and, in the cell, triggers the release of LH or FOLLICLE STIMULATING HORMONE by the cell. These receptors are also found in rat gonads. INHIBINS prevent the binding of GnRH to its receptors.

Follicle Stimulating Hormone, alpha Subunit
A non-covalently bound subunit of the glycoprotein hormones TSH; FOLLICLE STIMULATING HORMONE; LH; and HCG which originates in the anterior pituitary gland and placenta. This subunit is virtually identical in structure and indistinguishable by radioimmunoassay in all of the above glycoproteins. It is present in both men and women, but is elevated in postmenopausal women and in patients with hypothyroidism, uremia and malignant tumors. The alpha subunit may be involved directly in recognition of certain receptors.

Follicle Stimulating Hormone, Inappropriate Secretion
Inappropriate secretion of anterior pituitary gland hormones. The most common hormones involved in over-secretion are SOMATOTROPIN (which may cause ACROMEGALY) and PROLACTIN (which results in HYPERPROLACTINEMIA). THYROTROPIN; luteinizing hormone (LH); CORTICOTROPIN; and FOLLICLE STIMULATING HORMONE may also be secreted at inappropriate levels. Hypersecretion syndromes are frequently associated with the presence of a pituitary ADENOMA (see also PITUITARY NEOPLASMS).

Follicle Stimulating Hormone-Releasing Hormone Receptors
Receptors with a 6-kD protein on the surfaces of cells that secrete LH or FOLLICLE STIMULATING HORMONE, usually in the adenohypophysis. LHRH binds to these receptors, is endocytosed with the receptor and, in the cell, triggers the release of LH or FOLLICLE STIMULATING HORMONE by the cell. These receptors are also found in rat gonads. INHIBINS prevent the binding of GnRH to its receptors.

Follicle, Dental
Dense fibrous layer formed from mesodermal tissue that surrounds the epithelial enamel organ. The cells eventually migrate to the external surface of the newly formed root dentin and give rise to the cementoblasts that deposit cementum on the developing root, fibroblasts of the developing periodontal ligament, and osteoblasts of the developing alveolar bone.

Follicle, Graafian
Spheroidal cell aggregation in the ovary containing an ovum. It consists of an external fibro-vascular coat, an internal coat of nucleated cells, and a transparent, albuminous fluid in which the OVUM is suspended.

Follicle, Hair
A tube-like invagination of the epidermis from which the hair shaft develops and into which the sebaceous glands open. The hair follicle is lined by a cellular inner and outer root sheath of epidermal origin and is invested with a fibrous sheath derived from the dermis. Its anatomical designation is folliculus pili. (From Stedman, 25th ed)

Follicle, Ovarian
Spheroidal cell aggregation in the ovary containing an ovum. It consists of an external fibro-vascular coat, an internal coat of nucleated cells, and a transparent, albuminous fluid in which the OVUM is suspended.

Follicle-Stimulating Hormone
A gonadotropic hormone found in the anterior pituitary gland (PITUITARY GLAND, ANTERIOR) of mammals. It stimulates ovarian granulosa cells and testicular Sertoli cells, induces maturation of Graafian follicles in the ovary, and promotes the development of the germinal cells in the testis.

Follicle-Stimulating Hormone (FSH)
The hormone released from the pituitary. FSH stimulates estrogen production in females, and sperm production in males. FSH uses cyclic AMP as its second messenger.

Follicle-Stimulating Hormone Receptor
Cell surface proteins that bind FOLLICLE STIMULATING HORMONE with high affinity and trigger intracellular changes influencing the behavior of cells.

Follicle-Stimulating Hormone Receptors
Cell surface proteins that bind FOLLICLE STIMULATING HORMONE with high affinity and trigger intracellular changes influencing the behavior of cells.

Follicle-Stimulating Hormone, alpha Subunit
A non-covalently bound subunit of the glycoprotein hormones TSH; FOLLICLE STIMULATING HORMONE; LH; and HCG which originates in the anterior pituitary gland and placenta. This subunit is virtually identical in structure and indistinguishable by radioimmunoassay in all of the above glycoproteins. It is present in both men and women, but is elevated in postmenopausal women and in patients with hypothyroidism, uremia and malignant tumors. The alpha subunit may be involved directly in recognition of certain receptors.

Follicles
Each month several of these small egg-containing cavities develop on the ovary of an ovulating woman. Each cavity contains a single immature egg; ovulation occurs when a follicle (or sometimes more than one) ruptures and releases an egg.

Follicles, Dental
Dense fibrous layer formed from mesodermal tissue that surrounds the epithelial enamel organ. The cells eventually migrate to the external surface of the newly formed root dentin and give rise to the cementoblasts that deposit cementum on the developing root, fibroblasts of the developing periodontal ligament, and osteoblasts of the developing alveolar bone.

Follicles, Graafian
Spheroidal cell aggregation in the ovary containing an ovum. It consists of an external fibro-vascular coat, an internal coat of nucleated cells, and a transparent, albuminous fluid in which the OVUM is suspended.

Follicles, Hair
A tube-like invagination of the epidermis from which the hair shaft develops and into which the sebaceous glands open. The hair follicle is lined by a cellular inner and outer root sheath of epidermal origin and is invested with a fibrous sheath derived from the dermis. Its anatomical designation is folliculus pili. (From Stedman, 25th ed)

Follicles, Ovarian
Spheroidal cell aggregation in the ovary containing an ovum. It consists of an external fibro-vascular coat, an internal coat of nucleated cells, and a transparent, albuminous fluid in which the OVUM is suspended.

Follicular Adenocarcinoma
An adenocarcinoma of the thyroid gland, in which the cells are arranged in the form of follicles. (From Dorland, 27th ed)

Follicular Adenocarcinomas
An adenocarcinoma of the thyroid gland, in which the cells are arranged in the form of follicles. (From Dorland, 27th ed)

Follicular Adenoma
A benign epithelial tumor with a glandular organization.

Follicular Adenomas
A benign epithelial tumor with a glandular organization.

Follicular Atresia
The degeneration and resorption of an ovarian follicle before it reaches maturity and ruptures.

Follicular Atresias
The degeneration and resorption of an ovarian follicle before it reaches maturity and ruptures.

Follicular Cyst
Cyst due to the occlusion of the duct of a follicle or small gland.

Follicular cyst of the ovary
A fluid-filled sac in the ovary, the most common type of ovarian cyst. It results from the growth of a follicle. A follicle is the fluid-filled cyst that contains an egg. In some cycles, this follicle grows larger that normal and does not rupture to release the egg. Normally it resolves with simple observation over the course of days to months.

Follicular Cysts
Cyst due to the occlusion of the duct of a follicle or small gland.

Follicular Dendritic Cell
Cells with extensive dendritic processes found in the B-cell areas (primary follicles and germinal centers) of lymphoid tissue. They are unrelated to the DENDRITIC CELLS associated with T-cells. Follicular dendritic cells have Fc receptors (RECEPTORS, FC) and C3b receptors (RECEPTORS, COMPLEMENT 3B), but unlike other dendritic cells, they do not process or present antigen in a way that allows recognition by T-cells. Instead, they hold antigen in the form of immune complexes on their surfaces for long periods and can present antigen to B-cells during an immune response. (From Herbert et al., Dictionary of Immunology, 4th ed)

Follicular Dendritic Cells
Cells with extensive dendritic processes found in the B-cell areas (primary follicles and germinal centers) of lymphoid tissue. They are unrelated to the DENDRITIC CELLS associated with T-cells. Follicular dendritic cells have Fc receptors (RECEPTORS, FC) and C3b receptors (RECEPTORS, COMPLEMENT 3B), but unlike other dendritic cells, they do not process or present antigen in a way that allows recognition by T-cells. Instead, they hold antigen in the form of immune complexes on their surfaces for long periods and can present antigen to B-cells during an immune response. (From Herbert et al., Dictionary of Immunology, 4th ed)

Follicular Fluid
A fluid consisting of sex steroid hormones, plasma proteins, mucopolysaccharides, and electrolytes that is present in the vesicular ovarian follicle (Graafian follicle) surrounding the ovum.

Follicular Fluids
A fluid consisting of sex steroid hormones, plasma proteins, mucopolysaccharides, and electrolytes that is present in the vesicular ovarian follicle (Graafian follicle) surrounding the ovum.

Follicular Large Cell Lymphoma
Malignant lymphoma in which the majority of neoplastic cells within the follicles are large cleaved or noncleaved cells. The degree to which the follicular center cells retain their ability to form follicles varies with the state of B-cell transformation.

Follicular Large-Cell Lymphoma
Malignant lymphoma in which the majority of neoplastic cells within the follicles are large cleaved or noncleaved cells. The degree to which the follicular center cells retain their ability to form follicles varies with the state of B-cell transformation.

Follicular Large-Cell Lymphomas
Malignant lymphoma in which the majority of neoplastic cells within the follicles are large cleaved or noncleaved cells. The degree to which the follicular center cells retain their ability to form follicles varies with the state of B-cell transformation.

Follicular Lymphoma
Malignant lymphoma in which the lymphomatous cells are clustered into identifiable nodules within the lymph nodes. The nodules resemble to some extent the germinal centers of lymph node follicles and most likely represent neoplastic proliferation of lymph node-derived follicular center B-lymphocytes. This class of lymphoma usually occurs in older persons, is commonly multinodal, and possibly extranodal. Patients whose lymphomas present a follicular or nodular pattern generally have a more indolent course than those presenting with a diffuse pattern.

Follicular Lymphoma, Giant
Malignant lymphoma in which the lymphomatous cells are clustered into identifiable nodules within the lymph nodes. The nodules resemble to some extent the germinal centers of lymph node follicles and most likely represent neoplastic proliferation of lymph node-derived follicular center B-lymphocytes. This class of lymphoma usually occurs in older persons, is commonly multinodal, and possibly extranodal. Patients whose lymphomas present a follicular or nodular pattern generally have a more indolent course than those presenting with a diffuse pattern.

Follicular Lymphomas
Malignant lymphoma in which the lymphomatous cells are clustered into identifiable nodules within the lymph nodes. The nodules resemble to some extent the germinal centers of lymph node follicles and most likely represent neoplastic proliferation of lymph node-derived follicular center B-lymphocytes. This class of lymphoma usually occurs in older persons, is commonly multinodal, and possibly extranodal. Patients whose lymphomas present a follicular or nodular pattern generally have a more indolent course than those presenting with a diffuse pattern.

Follicular Lymphomas, Giant
Malignant lymphoma in which the lymphomatous cells are clustered into identifiable nodules within the lymph nodes. The nodules resemble to some extent the germinal centers of lymph node follicles and most likely represent neoplastic proliferation of lymph node-derived follicular center B-lymphocytes. This class of lymphoma usually occurs in older persons, is commonly multinodal, and possibly extranodal. Patients whose lymphomas present a follicular or nodular pattern generally have a more indolent course than those presenting with a diffuse pattern.

Follicular Mixed Cell Lymphoma
A low-grade malignant lymphoma of follicular pattern in which there is no clear preponderance of one cell type (small or large) over another. The large cells, cleaved or noncleaved, are often 2-3 times larger in diameter than normal lymphocytes.

Follicular Mixed-Cell Lymphoma
A low-grade malignant lymphoma of follicular pattern in which there is no clear preponderance of one cell type (small or large) over another. The large cells, cleaved or noncleaved, are often 2-3 times larger in diameter than normal lymphocytes.

Follicular Mixed-Cell Lymphomas
A low-grade malignant lymphoma of follicular pattern in which there is no clear preponderance of one cell type (small or large) over another. The large cells, cleaved or noncleaved, are often 2-3 times larger in diameter than normal lymphocytes.

Follicular Mucinoses
A disease of the pilosebaceous unit, presenting clinically as grouped follicular papules or plaques with associated hair loss. It is caused by mucinous infiltration of tissues, and usually involving the scalp, face, and neck. It may be primary (idiopathic) or secondary to mycosis fungoides or reticulosis.

Follicular Mucinosis
A disease of the pilosebaceous unit, presenting clinically as grouped follicular papules or plaques with associated hair loss. It is caused by mucinous infiltration of tissues, and usually involving the scalp, face, and neck. It may be primary (idiopathic) or secondary to mycosis fungoides or reticulosis.

Follicular Phase
The period of the menstrual cycle that begins with menstruation and ends with ovulation.

Follicular Phase Menstruation
The period of the menstrual cycle that begins with menstruation and ends with ovulation.

Follicular Phase Menstruations
The period of the menstrual cycle that begins with menstruation and ends with ovulation.

Follicular Phases
The period of the menstrual cycle that begins with menstruation and ends with ovulation.

Folliculi, Liquor
A fluid consisting of sex steroid hormones, plasma proteins, mucopolysaccharides, and electrolytes that is present in the vesicular ovarian follicle (Graafian follicle) surrounding the ovum.

Folliculin
A metabolite of estradiol but possessing less biological activity. It is found in the urine of pregnant women and mares, in the human placenta, and in the urine of bulls and stallions. According to the Fourth Annual Report on Carcinogens (NTP 85-002, 1985), estrone may reasonably be anticipated to be a carcinogen (Merck, 11th ed).

Folliculitis
Inflammation of the hair follicles.

Folliculitis Keloidalis
A type of acneiform disorder in which secondary pyogenic infection in and around pilosebaceous structures ends in keloidal scarring. It manifests as persistent folliculitis of the back of the neck associated with occlusion of the follicular orifices. It is most often encountered in black or Asian men.

Folling Disease
A group of autosomal recessive disorders marked by a deficiency of the hepatic enzyme PHENYLALANINE HYDROXYLASE or less frequently by reduced activity of DIHYDROPTERIDINE REDUCTASE (i.e., atypical phenylketonuria). Classical phenylketonuria is caused by a severe deficiency of phenylalanine hydroxylase and presents in infancy with developmental delay; SEIZURES; skin HYPOPIGMENTATION; ECZEMA; and demyelination in the central nervous system. (From Adams et al., Principles of Neurology, 6th ed, p952).

Folling Diseases
A group of autosomal recessive disorders marked by a deficiency of the hepatic enzyme PHENYLALANINE HYDROXYLASE or less frequently by reduced activity of DIHYDROPTERIDINE REDUCTASE (i.e., atypical phenylketonuria). Classical phenylketonuria is caused by a severe deficiency of phenylalanine hydroxylase and presents in infancy with developmental delay; SEIZURES; skin HYPOPIGMENTATION; ECZEMA; and demyelination in the central nervous system. (From Adams et al., Principles of Neurology, 6th ed, p952).

Follistim
Follistim is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): follitropin alfa-beta.

Follistim aq
Follistim aq is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): follitropin alfa-beta.

Follitropin
A gonadotropic hormone found in the anterior pituitary gland (PITUITARY GLAND, ANTERIOR) of mammals. It stimulates ovarian granulosa cells and testicular Sertoli cells, induces maturation of Graafian follicles in the ovary, and promotes the development of the germinal cells in the testis.

Follow Up Studies
Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.

Follow-Up Studies
Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.

Follow-Up Study
Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.

Followup Studies
Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.

Followup Study
Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.

Follutein
Follutein is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): gonadotropin, chorionic.



PREVIOUS AND NEXT TERMS
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Follow-Up Study
Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.

Follow Up Studies
Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.

Follitropin
A gonadotropic hormone found in the anterior pituitary gland (PITUITARY GLAND, ANTERIOR) of mammals. It stimulates ovarian granulosa cells and testicular Sertoli cells, induces maturation of Graafian follicles in the ovary, and promotes the development of the germinal cells in the testis.

Folling Diseases
A group of autosomal recessive disorders marked by a deficiency of the hepatic enzyme PHENYLALANINE HYDROXYLASE or less frequently by reduced activity of DIHYDROPTERIDINE REDUCTASE (i.e., atypical phenylketonuria). Classical phenylketonuria is caused by a severe deficiency of phenylalanine hydroxylase and presents in infancy with developmental delay; SEIZURES; skin HYPOPIGMENTATION; ECZEMA; and demyelination in the central nervous system. (From Adams et al., Principles of Neurology, 6th ed, p952).

Folling Disease
A group of autosomal recessive disorders marked by a deficiency of the hepatic enzyme PHENYLALANINE HYDROXYLASE or less frequently by reduced activity of DIHYDROPTERIDINE REDUCTASE (i.e., atypical phenylketonuria). Classical phenylketonuria is caused by a severe deficiency of phenylalanine hydroxylase and presents in infancy with developmental delay; SEIZURES; skin HYPOPIGMENTATION; ECZEMA; and demyelination in the central nervous system. (From Adams et al., Principles of Neurology, 6th ed, p952).

Folliculitides

Food Additive
Substances which are of little or no nutritive value, but are used in the processing or storage of foods or animal feed, especially in the developed countries; includes ANTIOXIDANTS; FOOD PRESERVATIVES; FOOD COLORING AGENTS; FLAVORING AGENTS; ANTI-INFECTIVE AGENTS (both plain and LOCAL); VEHICLES; EXCIPIENTS and other similarly used substances. Many of the same substances are PHARMACEUTIC AIDS when added to pharmaceuticals rather than to foods.

Fontan Operation
A procedure in which total right atrial or total caval blood flow is channeled directly into the pulmonary artery or into a small right ventricle that serves only as a conduit. The principal congenital malformations for which this operation is useful are TRICUSPID ATRESIA and single ventricle with pulmonary stenosis.

Fonofos
An organothiophosphorus cholinesterase inhibitor that is used as an insecticide.

Folylpolyglutamate Hydrolase
Catalyzes the hydrolysis of pteroylpolyglutamic acids in gamma linkage to pterolylmonoglutamic acid and free glutamic acid. EC 3.4.19.9.

Folyl Polyglutamate Cleavage Enzyme
Catalyzes the hydrolysis of pteroylpolyglutamic acids in gamma linkage to pterolylmonoglutamic acid and free glutamic acid. EC 3.4.19.9.

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