Lipoma natural history, complications and prognosis: Difference between revisions

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==Complications==
==Complications==
Lipomas are rarely life-threatening and the common subcutaneous lipomas are not a serious condition. Lipomas growing in internal organs can be more dangerous, for example lipomas in the gastrointestinal tract can cause bleeding, [[Peptic ulcer|ulceration]] and painful obstructions (so-called "malignant by location", despite being a benign growth histologically).<ref>{{cite journal |author=Thompson WM |title=Imaging and findings of lipomas of the gastrointestinal tract |journal=AJR Am J Roentgenol |volume=184 |issue=4 |pages=1163–71 |date=1 April 2005|pmid=15788588 |url=http://www.ajronline.org/cgi/pmidlookup?view=long&pmid=15788588 |doi=10.2214/ajr.184.4.01841163}}</ref><ref>{{cite journal |author=Taylor AJ, Stewart ET, Dodds WJ |title=Gastrointestinal lipomas: a radiologic and pathologic review |journal=AJR Am J Roentgenol |volume=155 |issue=6 |pages=1205–10 |date=1 December 1990|pmid=2122666 |url=http://www.ajronline.org/cgi/pmidlookup?view=long&pmid=2122666 |doi=10.2214/ajr.155.6.2122666}}</ref> Malignant transformation of lipomas into [[liposarcoma]]s is very rare and most liposarcomas are not produced from pre-existing benign lesions.<ref name=Dalal/> A few cases of malignant transformation have been described for bone and kidney lipomas,<ref>{{cite journal |author=Milgram JW |title=Malignant transformation in bone lipomas |journal=Skeletal Radiol. |volume=19 |issue=5 |pages=347–52 |year=1990 |pmid=2165632 |doi=10.1007/BF00193088}}</ref><ref>{{cite journal |author=Lowe BA, Brewer J, Houghton DC, Jacobson E, Pitre T |title=Malignant transformation of angiomyolipoma |journal=J. Urol. |volume=147 |issue=5 |pages=1356–8 |date=May 1992 |pmid=1569683}}</ref> but it is possible these few reported cases were well-differentiated liposarcomas in which the subtle [[malignant]] characteristics were missed when the tumour was first examined.<ref name=Enzinger08>{{cite book |author=Goldblum, John R.; Weiss, Sharon W.; Enzinger, Franz M. |title=Enzinger and Weiss's soft tissue tumors |publisher=Mosby Elsevier |year=2008 |isbn=0-323-04628-2 |edition=5th}}</ref> Deep lipomas have a greater tendency to recur than superficial lipomas, because complete surgical removal of deep lipomas is not always possible.<ref>{{cite book |author=Fletcher, C.D.M., Unni, K.K., Mertens, F. |title=Pathology and Genetics of Tumours of Soft Tissue and Bone |publisher=IARC Press |location=Lyon |year=2002 |isbn=92-832-2413-2 |series=World Health Organization Classification of Tumours |volume=4}}</ref>


==Prognosis==
==Prognosis==

Revision as of 19:00, 19 August 2015

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Natural History

Complications

Lipomas are rarely life-threatening and the common subcutaneous lipomas are not a serious condition. Lipomas growing in internal organs can be more dangerous, for example lipomas in the gastrointestinal tract can cause bleeding, ulceration and painful obstructions (so-called "malignant by location", despite being a benign growth histologically).[1][2] Malignant transformation of lipomas into liposarcomas is very rare and most liposarcomas are not produced from pre-existing benign lesions.[3] A few cases of malignant transformation have been described for bone and kidney lipomas,[4][5] but it is possible these few reported cases were well-differentiated liposarcomas in which the subtle malignant characteristics were missed when the tumour was first examined.[6] Deep lipomas have a greater tendency to recur than superficial lipomas, because complete surgical removal of deep lipomas is not always possible.[7]

Prognosis

The outlook of lipoma is always good. Usually most lipomas will not transform into liposarcomas.

References

  1. Thompson WM (1 April 2005). "Imaging and findings of lipomas of the gastrointestinal tract". AJR Am J Roentgenol. 184 (4): 1163–71. doi:10.2214/ajr.184.4.01841163. PMID 15788588.
  2. Taylor AJ, Stewart ET, Dodds WJ (1 December 1990). "Gastrointestinal lipomas: a radiologic and pathologic review". AJR Am J Roentgenol. 155 (6): 1205–10. doi:10.2214/ajr.155.6.2122666. PMID 2122666.
  3. Milgram JW (1990). "Malignant transformation in bone lipomas". Skeletal Radiol. 19 (5): 347–52. doi:10.1007/BF00193088. PMID 2165632.
  4. Lowe BA, Brewer J, Houghton DC, Jacobson E, Pitre T (May 1992). "Malignant transformation of angiomyolipoma". J. Urol. 147 (5): 1356–8. PMID 1569683.
  5. Goldblum, John R.; Weiss, Sharon W.; Enzinger, Franz M. (2008). Enzinger and Weiss's soft tissue tumors (5th ed.). Mosby Elsevier. ISBN 0-323-04628-2.
  6. Fletcher, C.D.M., Unni, K.K., Mertens, F. (2002). Pathology and Genetics of Tumours of Soft Tissue and Bone. World Health Organization Classification of Tumours. 4. Lyon: IARC Press. ISBN 92-832-2413-2.


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