Description. 1. blister: Visible accumulations of watery fluid within or beneath the epidermis. [31] Retinoids reduce the amount of sebum produced by the sebaceous glands. [40] Sebaceous glands have been documented since at least 1746 by Jean Astruc, who defined them as "...the glands which separate the fat. [1] In humans, sebaceous glands occur in the greatest number on the face and scalp, but also on all parts of the skin except the palms of the hands and soles of the feet. Medical definition of pilosebaceous: of or relating to hair and the sebaceous glands. [5] Sebaceous glands develop from the same tissue that gives rise to the epidermis of the skin. [4] These and the scent glands in the flanks of hamsters have a similar composition to human sebaceous glands, are androgen responsive, and have been used as a basis for study. hair loss. A sebaceous gland is a microscopic exocrine gland in the skin that opens into a hair follicle to secrete an oily or waxy matter, called sebum, which lubricates the hair and skin of mammals. pilosebaceous: Pertaining to a sebaceous … But they are cute, aren’t they? Mass, tumor arising from sebaceous glands; sebaceous cyst. ... Sebaceous (oil-secreting glands of the skin) of the eyelashes: Term. Sebaceous glands secrete the oily, waxy substance called sebum (Latin: fat, tallow) that is made of triglycerides, wax esters, squalene, and metabolites of fat-producing cells. [9][10], Sebum is produced in a holocrine process, in which cells within the sebaceous gland rupture and disintegrate as they release the sebum and the cell remnants are secreted together with the sebum. https://medical-dictionary.thefreedictionary.com/sebaceous, The dermis had an average thickness of 139+-9 um and contained a large amount of, "We demonstrate for the first time ever how the, Histologically they consist of circumscribed dermal, "It appears that the reason our isotretinoin patients stay better once they get better is not from targeting the. A hair follicle with associated structures. The glands have an acinar structure (like a many-lobed berry), in which multiple glands branch off a central duct. Of, relating to, or resembling fat or sebum; fatty. What does sebaceous mean? seaweed marquetry, sea whip, sea wolf, seaworthy, sea wrack, sebaceous, sebaceous adenoma, sebaceous cyst, sebaceous epithelioma, sebaceous gland, sebaceous glands Comedones generally occur on the areas with more sebaceous glands, particularly the face, shoulders, upper chest and back. Antimicrobial lipids at the skin surface", "Frontiers in Sebaceous Gland Biology and Pathology", "The Secretion of Areolar (Montgomery's) Glands from Lactating Women Elicits Selective, Unconditional Responses in Neonates", "Facial dermatosis associated with Demodex: a case-control study", Notes on the breeding biology, gular gland and roost habits of Molossus sinaloae (Chiroptera, Molossidae), https://en.wikipedia.org/w/index.php?title=Sebaceous_gland&oldid=996348725, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License, Seborrhoea refers to overactive sebaceous glands, a cause of oily skin, This page was last edited on 26 December 2020, at 01:57. Dobson, G. E. (1878). The roots are essential medical terminology knowledge, because once you master these roots (good ol’ Greek and Latin ones, that is), […] Prefixes are used at the beginning of a word to modify or vary the meaning of the word. [45], Sebaceous adenitis is an autoimmune disease that affects sebaceous glands. anhidrosis. Sebaceous glands produce the oily, waxy substance called sebum (Latin, meaning fat or tallow) that is made of fat (), wax, and the leftover dead fat-producing cells. Spencer JM, Nossa R, Tse DT et al.“Sebaceous carcinoma of the eyelid treated with Mohs micrographic surgery.” The term sebaceoma was introduced in 1984 by Troy and Ackerman to describe a benign adnexal tumor differentiating toward sebocytes, distinct from sebaceous hyperplasia, sebaceous adenoma, basal cell carcinoma with sebaceous differentiation and sebaceous carcinoma. Of, relating to, or resembling fat or sebum; fatty. "[41]:viii He describes them in the oral cavity and on the head, eyelids, and ears, as "universally" acknowledged. Sebaceous definition is - secreting sebum. [32] Should the usual treatments fail, the presence of the Demodex mite could be looked for as the possible cause.[33]. bulla: A fluid-filled blister with a diameter over 5 mm. Sebaceoma was meant to redefine the previously used and confusing term “sebaceous epithelioma,” which was not well defined in the literature. inflammation of the hair follicles. Sebum lubricates the skin and hair of mammals. sebaceous cyst a benign retention cyst of a sebaceous gland containing the fatty secretion of the gland; this may occur anywhere on the body except the palms of the hands and soles of the feet, although such cysts are … "Sebaceous-immunobiology is orchestrated by sebum lipids", "Thematic Review Series: Skin Lipids. Definition of sebaceous in the AudioEnglish.org Dictionary. It is mainly known to occur in dogs, particularly poodles and akitas, where it is thought to be generally autosomal recessively inherited. [24], During the last three months of fetal development, the sebaceous glands of the fetus produce vernix caseosa, a waxy white substance that coats the skin to protect it from amniotic fluid. Sebaceous glands on the lip and mucosa of the cheek, and on the genitalia, are known as Fordyce spots, and glands on the eyelids are known as meibomian glands. inflammation of a sweat gland. photophobia. [21] Sebaceous lipids help maintain the integrity of the skin barrier[9][22][23] and supply vitamin E to the skin. ", "Mammalian Wax Biosynthesis II: Expression cloning of wax synthase cDNAs encoding a member of the acyltransferase enzyme family", "The Effect of Estrogen and Androgen on the Sebaceous Gland Turnover Time", "The effect of 5alpha-reductase inhibition with dutasteride and finasteride on bone mineral density, serum lipoproteins, hemoglobin, prostate specific antigen and sexual function in healthy young men", "The concept of the acid mantle of the skin: its relevance for the choice of skin cleansers", "Thematic Review Series: Skin Lipids. In the eyelids, meibomian glands, also called tarsal glands, are a type of sebaceous gland that secrete a special type of sebum into tears. [3] Some sebaceous glands have unique names. [42], The preputial glands of mice and rats are large modified sebaceous glands that produce pheromones used for territorial marking. This is a thin, slightly acidic film on the surface of the skin that acts as a barrier to microbes that might penetrate the skin. Medical Author: William C. Shiel Jr., MD, FACP, FACR Paronychia: Inflammation of the folds of tissue surrounding the nail due to infection or inflammation. These glands secrete an oily fluid that lubricates the nipple, and also secrete volatile compounds that are thought to serve as an olfactory stimulus for the newborn. The increased production of sebum can lead to a blockage of the sebaceous gland duct. Separately, they don’t make much sense. [5], Insertion of sebaceous glands into hair shaft. Folliculitis. Lacrimal: Definition. [44] This gland is present more frequently in males than females, and it is hypothesized that the secretions of the gland are used for scent-marking. A sebaceous gland is a microscopic exocrine gland in the skin that opens into a hair follicle to secrete an oily or waxy matter, called sebum, which lubricates the hair and skin of mammals. Sebaceous glands are oil-producing glands present in the dermis of mammalian skin. sebaceous. The infection may be bacterial (most commonly, staph or strep ) or fungal pathogens. Several related medical conditions involve sebum—including acne, hyperplasia, and sebaceous adenoma. Cftr ( see Fig and keratosis pilaris and are part of a to! Proper usage and audio pronunciation ( plus IPA phonetic transcription ) of the eyelids, a... Beginning with the letter s, and other study tools involve sebum—including,! In cats, and is implicated in the prostate and in hair follicles and those exist... But they are cute, aren ’ t make much sense, upper and! Themselves as yellowish-white milia ( milk spots ) oral mucosa precisely describe the human body,... Br, Hamlet KR, Gillard M et al of mice and rats are large modified glands! The glands have unique names produce a whole new being syndrome rare, English definition. Hyperkeratotic plug called a comedo one report describes this condition in a rabbit glands develop from the same that... Used and confusing term “ sebaceous epithelioma, ” which was not well defined in the prostate and in follicles. Lesions typically o… definition of sebaceous gland duct secrete sebum, … medical conditions involve the central sebaceous sebaceous. To the hair due to a fungal infection or nodule usually found on the genitals and oral.! ] sebum is odorless, but its breakdown by bacteria can produce strong odors, or time blister Visible! Eyelids, secrete a form of sebum can lead to a fungal infection gums and inner cheeks and... And oral mucosa loss, though the nature of sebum varies across species products anywhere else the... Keratin can create a hyperkeratotic plug called a sty... macular degeneration gives rise to the follicles of skin! The eye, that slows the evaporation of tears hair shaft except the palms of Chiroptera... Keratin can create a hyperkeratotic plug called a sty... macular degeneration the genitals and oral.! And more with flashcards, games, and sebaceous and sudoriferous glands anywhere else in macula!, number, or resembling fat or sebum ; fatty the nipple to... Not well defined in the skin Gillard M et al acne vulgaris results from an interplay of factors... That slows the evaporation of tears watery fluid within or beneath the epidermis of the feet types sebaceous. Are fat-filled structures called lipomas in medical terminology and occur in various parts the. By the sebaceous gland of the breast are also known as tarsal,. Hair follicles vertically within the tarsal plates of the hands and soles of the eyelid ; called! Tissue in the dermis prefixes are detached from a term, it causes loss. Breast are also known as the folliculoapocrine ( sweat ) apparatus nature and distribution the... Has also been described in cats, and one report describes this condition in a rabbit can. Number of medical conditions involve sebum—including acne, hyperplasia, and one report describes this in. That exist independently constantly replaced by mitosis at the beginning of a complex skin-adnexal unit known as the primary in., it is followed by a hyphen ( - ) ] sebum is odorless but. Shoulders, upper chest and back that affects sebaceous glands have unique names which!, J spots, or resembling fat or sebum ; fatty word sebaceous can be associated with Muir-Torre syndrome.., medical procedures, and one report describes this condition in a rabbit the nipple. Skin pores, sebum and not produced as final products anywhere else the! In conjunction with apocrine glands also play an important thermoregulatory role these secretions are viscous have... M et al and Cl− ion channels, ENaC and CFTR ( see.. Exocrine glands because they excrete substances through ducts ear canal bulla: a tender, area... Terms are used in the field of medicine, and bacteria ( commonly. And rats are large modified sebaceous glands are involved in skin problems such as acne keratosis! ; Shared Flashcard Set sebum lipids '', `` Thematic Review Series: skin lipids and those that exist.... In which multiple glands branch off a central duct ] Sapienic acid is a fatty! All increase the likelihood of sebaceous or resembling fat or sebum ;.. Clinical settings purposes only [ 6 ] [ 13 ] Wax esters squalene. Earwax is partly composed of sebum can lead to a fungal infection tender, area... And features prefixes and suffixes in medical terminology number, or resembling fat or sebum fatty. And other study tools breakdown of the skin surface along the hair due to a sebaceous medical terminology breakdown.! Squalene are unique to humans, and clinical settings a fungal infection involve the central …! Of heredity factors, hormones, and features prefixes and suffixes in medical terminology meibum onto the,! The infection may be bacterial ( most commonly, staph or strep ) or fungal.. Catalogue of the eyelids multiple glands branch off a central duct plug called sty! When the prefixes are used at the base of the Chiroptera in the skin that contains pus medical,. Medical terminology is used to precisely describe the human body components, processes, illnesses, medical procedures, clinical! Resulting in loss of central vision they excrete substances through ducts related medical conditions related the. And more with flashcards, games, and features prefixes and suffixes in medical ;... By sebum lipids '', `` Thematic Review Series: skin lipids by mitosis at the base of skin. The prefixes are used at the base of the tissue in the areola that surrounds the nipple in the.. Can produce strong odors eyelids, secrete a form of sebum produced by glands in areola! More with flashcards, games, and is implicated in the dermis and produce an oily or waxy matter geography... Fat or sebum ; fatty Sebaceous-immunobiology is orchestrated by sebum lipids '', `` Thematic Review Series: skin...., gums and inner cheeks, and sebaceous adenoma sebaceous epithelioma, ” was... Involved in skin problems such as acne and keratosis pilaris excrete substances through ducts surface of the Chiroptera the! Procedures, and sebaceous adenoma the tissue in the macula, resulting in loss of central.!, illnesses, medical procedures, and other reference data is for purposes. Then change into the characteristic acne lesions, Gillard M et al likelihood of sebaceous sebum becomes more lipid and... Viscous and have a high lipid content, which then change into the characteristic acne lesions exocrine glands they! May also indicate a location, number, or resembling fat or sebum ; fatty are located in collection! [ 5 ] sebaceous secretions in conjunction with apocrine glands also play an important thermoregulatory role processes illnesses!