Leiomyosarcoma causes: Difference between revisions
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== Overview: == | |||
Leimoyosarcoma is a malignant aggressive form of soft tissue [[sarcoma]] which can invlove [[muscle cells]]. [[Uterine]] leiomyosarcoma is a rare disease, involves uterine [[smooth muscle cells]]. Exact cause of leiomyosarcoma is not well understood but there is theory which finds leiomyosarcoma, arising from benign [[tumor]] of uterine [[smooth muscle]], called [[leiomyoma]]. It is believed that it may arie denovo or due to [[genetic]] alterations. | |||
__NOTOC__ | __NOTOC__ | ||
{{Leiomyosarcoma}} | {{Leiomyosarcoma}} | ||
== Causes: == | |||
Exact cause of leiomyosarcoma is not clearly unerstood, however following points are considered regarding causes:<ref name="pmid19051832">{{cite journal |vauthors=Indraccolo U, Luchetti G, Indraccolo SR |title=Malignant transformation of uterine leiomyomata |journal=Eur. J. Gynaecol. Oncol. |volume=29 |issue=5 |pages=543–4 |date=2008 |pmid=19051832 |doi= |url=}}</ref><ref name="pmid29780656">{{cite journal| author=Crystal JS, Korderas K, Schwartzberg D, Tizio SC, Zheng M, Parker G| title=Primary Leiomyosarcoma of the Colon: A Report of Two Cases, Review of the Literature, and Association with Immunosuppression for IBD and Rheumatoid Arthritis. | journal=Case Rep Surg | year= 2018 | volume= 2018 | issue= | pages= 6824643 | pmid=29780656 | doi=10.1155/2018/6824643 | pmc=5892970 | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=29780656 }}</ref><ref name="pmid26097728">{{cite journal |vauthors=Duffaud F, Ray-Coquard I, Salas S, Pautier P |title=Recent advances in understanding and managing leiomyosarcomas |journal=F1000Prime Rep |volume=7 |issue= |pages=55 |date=2015 |pmid=26097728 |pmc=4447031 |doi=10.12703/P7-55 |url=}}</ref> | |||
* Studies revealed that the [[PI3K]]/[[AKT]]/[[mTOR]], [[estrogen]]-mediated [[S-phase]] entry and [[DNA]] damage response signaling pathways, for which inhibitors have already been developed and approved, frequently harbored genetic changes. | |||
* Although not proven but some reasearchers believes that it could be a malignant transformation of the [[fibroid]] ([[leiomyoma]]). | |||
* It may arise denovo or can be due to the [[genomic]] instability but the [[molecular]] mechanism is not quite well endrstood. | |||
* Over expression of the [[protooncogene]] [[C-myc]] is seen in some of the cases. | |||
* [[Retinobalstoma]] gene discrepancies are also seen in 90% of cases. | |||
* [[P16]] [[chromosomal]] deletion causes loss of [[tumor suppression]] and so is involved in the development of leiomyosarcoma. | |||
* [[P53]] gene [[mutation]] is also frequently seen in uterine leiomyosarcoma. | |||
* [[Epstein Barr virus|Epstein-Barr virus]] ([[EBV]]) infection, in the setting of severe [[immunosuppression]], has been associated with leiomyosarcomas. | |||
==References== | ==References== | ||
Latest revision as of 20:33, 14 March 2019
Overview:
Leimoyosarcoma is a malignant aggressive form of soft tissue sarcoma which can invlove muscle cells. Uterine leiomyosarcoma is a rare disease, involves uterine smooth muscle cells. Exact cause of leiomyosarcoma is not well understood but there is theory which finds leiomyosarcoma, arising from benign tumor of uterine smooth muscle, called leiomyoma. It is believed that it may arie denovo or due to genetic alterations.
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Causes:
Exact cause of leiomyosarcoma is not clearly unerstood, however following points are considered regarding causes:[1][2][3]
- Studies revealed that the PI3K/AKT/mTOR, estrogen-mediated S-phase entry and DNA damage response signaling pathways, for which inhibitors have already been developed and approved, frequently harbored genetic changes.
- Although not proven but some reasearchers believes that it could be a malignant transformation of the fibroid (leiomyoma).
- It may arise denovo or can be due to the genomic instability but the molecular mechanism is not quite well endrstood.
- Over expression of the protooncogene C-myc is seen in some of the cases.
- Retinobalstoma gene discrepancies are also seen in 90% of cases.
- P16 chromosomal deletion causes loss of tumor suppression and so is involved in the development of leiomyosarcoma.
- P53 gene mutation is also frequently seen in uterine leiomyosarcoma.
- Epstein-Barr virus (EBV) infection, in the setting of severe immunosuppression, has been associated with leiomyosarcomas.
References
- ↑ Indraccolo U, Luchetti G, Indraccolo SR (2008). "Malignant transformation of uterine leiomyomata". Eur. J. Gynaecol. Oncol. 29 (5): 543–4. PMID 19051832.
- ↑ Crystal JS, Korderas K, Schwartzberg D, Tizio SC, Zheng M, Parker G (2018). "Primary Leiomyosarcoma of the Colon: A Report of Two Cases, Review of the Literature, and Association with Immunosuppression for IBD and Rheumatoid Arthritis". Case Rep Surg. 2018: 6824643. doi:10.1155/2018/6824643. PMC 5892970. PMID 29780656.
- ↑ Duffaud F, Ray-Coquard I, Salas S, Pautier P (2015). "Recent advances in understanding and managing leiomyosarcomas". F1000Prime Rep. 7: 55. doi:10.12703/P7-55. PMC 4447031. PMID 26097728.