Glomus tumor pathophysiology: Difference between revisions
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==Pathophysiology== | ==Pathophysiology== | ||
*Glomus tumor arises from modified smooth muscle cells of the glomus body (or glomus apparatus).<ref name=rs>Glomus tumor. Wikipedia. https://en.wikipedia.org/wiki/Glomus_tumor Accessed on January 7, 2016.</ref> | *Glomus tumor arises from modified smooth muscle cells of the glomus body (or glomus apparatus).<ref name=rs>Glomus tumor. Wikipedia. https://en.wikipedia.org/wiki/Glomus_tumor Accessed on January 7, 2016.</ref> | ||
*The glomus body is a neuromyoarterial plexus in the stratum reticulare | *The glomus body is a neuromyoarterial plexus located in the stratum reticulare, that is normally involved in thermoregulation. Although the glomus tumors are mostly concentrated in the digits, they are distributed throughout the body.<ref name="pmid10847529">{{cite journal| author=Kim DH| title=Glomus tumor of the finger tip and MRI appearance. | journal=Iowa Orthop J | year= 1999 | volume= 19 | issue= | pages= 136-8 | pmid=10847529 | doi= | pmc=PMC1888624 | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=10847529 }} </ref> | ||
==Genetics== | ==Genetics== | ||
Revision as of 15:54, 12 January 2016
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Glomus tumor Microchapters |
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Glomus tumor pathophysiology On the Web |
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Risk calculators and risk factors for Glomus tumor pathophysiology |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Soujanya Thummathati, MBBS [2]
Overview
Glomus tumor arises from modified smooth muscle cells of the glomus body (or glomus apparatus). The glomus body is a neuromyoarterial plexus in the dermis of skin that is normally involved in thermoregulation.[1] The gene involved in the pathogenesis of familial glomangioma is ''glomulin'' (''GLMN'') gene.[2] On gross pathology, small (usually less than 1 cm), bluish or whitish, well circumscribed, solitary nodules are characteristic findings of glomus tumor.[1] On microscopic histopathological analysis, branching vascular channels and aggregates of specialised glomus cells are characteristic findings of glomus tumor.[3]
Pathophysiology
- Glomus tumor arises from modified smooth muscle cells of the glomus body (or glomus apparatus).[1]
- The glomus body is a neuromyoarterial plexus located in the stratum reticulare, that is normally involved in thermoregulation. Although the glomus tumors are mostly concentrated in the digits, they are distributed throughout the body.[4]
Genetics
- Familial glomangioma is a variant of glomus tumor where the patient presents with multiple glomus tumors.[1] [2]
- The gene involved in the pathogenesis of familial glomangioma is ''glomulin'' (''GLMN'') gene.[1] [2]
Associated Conditions
Gross Pathology
- On gross pathology, small (usually less than 1 cm), bluish or whitish, well circumscribed, solitary nodules are characteristic findings of glomus tumor.[1]
- Multiple glomus tumors are usually less circumscribed and less solid than the solitary glomus tumors.[2]
Microscopic Findings
- On microscopic histopathological analysis, characteristic findings of glomus tumor include:[3]
- Branching vascular channels
- Aggregates of specialized glomus cells
- Inconspicuous to well-defined nucleoli
-
![Intermediate magnification micrograph of a glomus tumor. H&E stain.[7]](/images/3/39/Glomus_tumour_-_intermed_mag.jpg)
Intermediate magnification micrograph of a glomus tumor. H&E stain.[7]
-
![High magnification micrograph of a glomus tumor. H&E stain.[7]](/images/d/d8/1200px-Glomus_tumour_-_high_mag.jpg)
High magnification micrograph of a glomus tumor. H&E stain.[7]
-
![Very high magnification micrograph of a glomus tumor. H&E stain.[7]](/images/4/48/1200px-Glomus_tumour_-_2_-_very_high_mag.jpg)
Very high magnification micrograph of a glomus tumor. H&E stain.[7]
![Intermediate magnification micrograph of a glomus tumor. H&E stain.[7]](/index.php/File:Glomus_tumour_-_intermed_mag.jpg)
![High magnification micrograph of a glomus tumor. H&E stain.[7]](/index.php/File:1200px-Glomus_tumour_-_high_mag.jpg)
![Very high magnification micrograph of a glomus tumor. H&E stain.[7]](/index.php/File:1200px-Glomus_tumour_-_2_-_very_high_mag.jpg)
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Glomus tumor. Wikipedia. https://en.wikipedia.org/wiki/Glomus_tumor Accessed on January 7, 2016.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Gombos Z, Zhang PJ (2008). "Glomus tumor". Arch Pathol Lab Med. 132 (9): 1448–52. doi:10.1043/1543-2165(2008)132[1448:GT]2.0.CO;2. PMID 18788860.
- ↑ 3.0 3.1 Glomus tumor. Radiopedia. http://radiopaedia.org/articles/glomangioma Accessed on January 7, 2016.
- ↑ Kim DH (1999). "Glomus tumor of the finger tip and MRI appearance". Iowa Orthop J. 19: 136–8. PMC 1888624. PMID 10847529.
- ↑ Kumar, Monique G.; Emnett, Ryan J.; Bayliss, Susan J.; Gutmann, David H. (2014). "Glomus tumors in individuals with neurofibromatosis type 1". Journal of the American Academy of Dermatology. 71 (1): 44–48. doi:10.1016/j.jaad.2014.01.913. ISSN 0190-9622.
- ↑ Stewart, D. R.; Sloan, J. L.; Yao, L.; Mannes, A. J.; Moshyedi, A.; Richard Lee, C.-C.; Sciot, R.; De Smet, L.; Mautner, V.-F.; Legius, E. (2010). "Diagnosis, management, and complications of glomus tumours of the digits in neurofibromatosis type 1". Journal of Medical Genetics. 47 (8): 525–532. doi:10.1136/jmg.2009.073965. ISSN 0022-2593.
- ↑ 7.0 7.1 7.2 Glomus tumor. Wikimedia commons. https://commons.wikimedia.org/wiki/File:Glomus_tumour_-_very_high_mag.jpg#/media/File:Glomus_tumour_-_intermed_mag.jpg Accessed on January 7, 2016.
