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*Spindle-cell lipoma/pleomorphic lipoma
*Spindle-cell lipoma/pleomorphic lipoma
*Hibernoma
*Hibernoma
 
Weiss and Goldblum classified Lipomatous [[tumors]] into the following subtypes. This classification system has shown more clinical utility.<ref>{{cite book | last = Goldblum | first = John | title = Enzinger and Weiss's soft tissue tumors | publisher = Saunders/Elsevier | location = Philadelphia, PA | year = 2014 | isbn = 9781455737635 }}</ref>
Lipomas have many subtypes as follows:
* Lipoma which may be classified as superficial or deep, single or multiple
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>
*Variants of lipoma including:
*'''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>
**Angiolipoma
*'''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.
**Myolipoma
*'''[[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>
**Chondroid lipoma
*'''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>
**Lipoblastoma
*'''Chondroid lipomas''' are deep-seated, firm, yellow tumors that characteristically occur on the legs of women.
**Lpindle-cell/pleomorphic lipoma
*'''[[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.
*Lipomatous tumors including:
*'''Hibernomas''' are lipoma of [[brown fat]].
**Intramuscular lipoma
*'''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" />
**Intermuscular lipoma
*'''Neural fibrolipomas''' are overgrowths of fibro-fatty tissue along a nerve trunk, which often leads to nerve compression.
**Lipomatosis of nerve
*'''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.
**Lipoma of the tendon sheath and joint
*'''Spindle-cell lipomas''' are asymptomatic, slow-growing subcutaneous tumors that have a predilection for the posterior back, neck, and shoulders of older men.
*Infiltrating lipomas including
*'''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.
**Diffuse lipomatosis
 
**Symmetric lipomatosis
**Adiposis dolorosa
*Hibernoma
==References==
==References==
{{reflist|2}}
{{reflist|2}}

Revision as of 18:30, 8 November 2019

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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

Lipomas can be classified according to their anatomical locations into:[1]

  • Dermal
  • Subcutaneous
  • Subfascial

Another suggested classification is according to the related structure:

  • Muscles-related lipoma
  • Nerve-related lipoma
  • Bone-related lipoma
  • Synovium-related lipoma

World health organization (WHO) classification system classified lipomatous tumors into the following subtypes:[2]

  • Lipoma
  • Lipomatosis
  • Lipomatosis of nerve
  • Lipoblastoma/lipoblastomatosis
  • Angiolipoma
  • Myolipoma of soft tissue
  • Chondroid lipoma
  • Spindle-cell lipoma/pleomorphic lipoma
  • Hibernoma

Weiss and Goldblum classified Lipomatous tumors into the following subtypes. This classification system has shown more clinical utility.[3]

  • Lipoma which may be classified as superficial or deep, single or multiple
  • Variants of lipoma including:
    • Angiolipoma
    • Myolipoma
    • Chondroid lipoma
    • Lipoblastoma
    • Lpindle-cell/pleomorphic lipoma
  • Lipomatous tumors including:
    • Intramuscular lipoma
    • Intermuscular lipoma
    • Lipomatosis of nerve
    • Lipoma of the tendon sheath and joint
  • Infiltrating lipomas including
    • Diffuse lipomatosis
    • Symmetric lipomatosis
    • Adiposis dolorosa
  • Hibernoma

References

  1. ↑ Al-Qattan, M. M.; Al-Lazzam, A. M.; Al Thunayan, A.; Al Namlah, A.; Mahmoud, S.; Hashem, F.; Tulbah, A. (2012). "CLASSIFICATION OF BENIGN FATTY TUMOURS OF THE UPPER LIMB". Hand Surgery. 10 (01): 43–59. doi:10.1142/S0218810405002541. ISSN 0218-8104.
  2. ↑ Bancroft, Laura W.; Kransdorf, Mark J.; Peterson, Jeffrey J.; O’Connor, Mary I. (2006). "Benign fatty tumors: classification, clinical course, imaging appearance, and treatment". Skeletal Radiology. 35 (10): 719–733. doi:10.1007/s00256-006-0189-y. ISSN 0364-2348.
  3. ↑ Goldblum, John (2014). Enzinger and Weiss's soft tissue tumors. Philadelphia, PA: Saunders/Elsevier. ISBN 9781455737635.


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