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| ==Classification== | | ==Classification== |
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| There are many subtypes of lipomas:<ref name="Andrews">{{cite book| edition = 10th| publisher = Elsevier| isbn = 0-7216-2921-0| last = James| first = William D.| first2 = Timothy G. |last2=Berger|first3= Dirk M.|last3= Elston| title = Andrews' Diseases of the Skin: Clinical Dermatology|location=London|year=2005}}</ref>
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| * '''Adenolipomas''' are lipomas associated with [[eccrine sweat glands]].<ref name="Andrews new ed." >{{cite book| edition = 11th| publisher = Elsevier| isbn = 9781437703146| last = James| first = William D.| first2 = Timothy G. |last2=Berger|first3= Dirk M.|last3= Elston| title = Andrews' Diseases of the Skin: Clinical Dermatology|location=London|year=2011}}</ref> | |
| * '''Angiolipoleiomyomas''' are acquired, solitary, asymptomatic acral nodules, characterized histologically by well-circumscribed subcutaneous tumors composed of [[smooth muscle cells]], [[blood vessels]], [[connective tissue]], and fat.
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| * '''[[Angiolipoma]]s''' painful subcutaneous nodules having all other features of a typical lipoma.<ref name="Andrews"/><ref name="Bolognia">{{cite book |author=Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. |title=Dermatology: 2-Volume Set |publisher=Mosby |location=St. Louis |year=2007 |pages=1838 |isbn=1-4160-2999-0 |oclc= |doi= |accessdate=}}</ref>
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| * '''Cerebellar pontine angle and internal auditory canal lipomas'''<ref>{{cite journal | author = Crowson MG, Symons SP, Chen JM | year = | title = Left cerebellopontine angle lipoma with mild brainstem compression in a 13-year-old female | url = | journal = Otology& Neurotology | volume = | issue = | page = }}</ref>
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| * '''Chondroid lipomas''' are deep-seated, firm, yellow tumors that characteristically occur on the legs of women.
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| * '''[[Corpus callosum]] lipoma''' is a rare congenital brain condition that may or may not present with symptoms.<ref>{{cite journal |author=Wallace D |title=Lipoma of the corpus callosum |journal=J Neurol Neurosurg Psychiatry. |volume=39 |issue=12 |pages=1179–85 |date=December 1976 |pmid=1011028 |pmc=492562 |doi= 10.1136/jnnp.39.12.1179|url=}}</ref> This occurs in the corpus callosum, also known as the colossal commissure, which is a wide, flat bundle of neural fibers beneath the cortex in the human brain.
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| * '''Hibernomas''' are lipoma of [[brown fat]].
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| * '''Intradermal spindle cell lipomas''' are distinct in that they most commonly affect women and have a wide distribution, occurring with relatively equal frequency on the head and neck, trunk, and upper and lower extremities.<ref name="Andrews"/><ref name="Bolognia">{{cite book |author=Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. |title=Dermatology: 2-Volume Set |publisher=Mosby |location=St. Louis |year=2007 |pages=1838–9 |isbn=1-4160-2999-0 |oclc= |doi= |accessdate=}}</ref>
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| * '''Neural fibrolipomas''' are overgrowths of fibro-fatty tissue along a nerve trunk, which often leads to nerve compression.
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| * '''Pleomorphic lipomas''', like spindle-cell lipomas, occur for the most part on the backs and necks of elderly men and are characterized by floret giant cells with overlapping nuclei.
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| * '''Spindle-cell lipomas''' are asymptomatic, slow-growing subcutaneous tumors that have a predilection for the posterior back, neck, and shoulders of older men.
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| * '''Superficial subcutaneous lipomas''', the most common type of lipoma, lie just below the surface of the skin. Most occur on the [[torso|trunk]], [[thigh]], and [[forearm]], although they may be found anywhere in the body where fat is located.
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| ==References== | | ==References== |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Lipoma may be classified into 12 subtypes: adenolipomas, angiolipoleiomyomas, angiolipoma, cerebellar pontine angle and internal auditory canal lipomas, chondroid lipomas, corpus callosum, hibernomas, intradermal spindle cell lipomas, neural fibrolipomas, pleomorphic lipomas, spindle-cell lipomas, and superficial subcutaneous lipomas.
Classification
References
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