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a skillet made of cast iron
predatory arachnid with eight legs, two poison fangs, two feelers, and usually two silk-spinning organs at the back end of the body; they spin silk to make cocoons for eggs or traps for prey
a computer program that prowls the internet looking for publicly accessible resources that can be added to a database; the database can then be searched with a search engine (同)wanderer
a tumor consisting of a mass of blood or lymphatic vessels

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クモ / 《米》フライパン

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/03/22 21:59:49」(JST)

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A spider angioma (also known as a nevus araneus, spider nevus, vascular spider, and spider telangiectasia^[1]) is a type of telangiectasis^[2] (swollen blood vessels) found slightly beneath the skin surface, often containing a central red spot and reddish extensions which radiate outwards like a spider's web. They are common and may be benign, presenting in around 10–15% of healthy adults and young children.^[3] However, having more than three spider angiomas is likely to be abnormal and may be a sign of liver disease. It also suggests the probability of esophageal varices.^[4]

Distribution

Spider angiomas are found only in the distribution of the superior vena cava, and are thus commonly found on the face, neck, upper part of the trunk, and arms. They may also be present on the backs of the hands and fingers in young children.^{[citation needed]}

Cause

Spider angiomas are due to failure of the sphincteric muscle surrounding a cutaneous arteriole. The central red dot is the dilated arteriole and the red "spider legs" are small veins carrying away the freely flowing blood. If momentary pressure is applied, it is possible to see the emptied veins refilling from the centre. No other angiomas show this phenomenon.^{[citation needed]}

The dilation, in turn, is caused by increased estrogen levels in the blood. Many pregnant women, or women using hormonal contraception, have spider angiomas, due to high estrogen levels in their blood. Individuals with significant hepatic disease also show many spider angiomas, as their liver cannot metabolize circulating estrogens, specifically estrone, which derives from the androgen androstenedione.^[3] About 33% of patients with cirrhosis have spider angiomas.^[5] As such, microhemorrhages may be observed as spider angiomas.^{[citation needed]}

Treatment

Spider angiomas are asymptomatic and usually resolve spontaneously. This is common in the case of children, although they may take several years to disappear. If the spider angiomas are associated with pregnancy, they may resolve after childbirth. In women taking oral contraceptives, they may resolve after stopping these contraceptives. The spider angiomas associated with liver disease may resolve when liver function increases or when a liver transplant is performed.^{[citation needed]}

For spider angiomas on the face, techniques such as electrodesiccation and laser treatment can be used to remove the lesion.^[6] There is a small risk of a scar, although the results are generally good. Spider angiomas can recur after treatment.

References

^ Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. (2007). Dermatology: 2-Volume Set. St. Louis: Mosby. pp. 1621–22. ISBN 1-4160-2999-0.
^ "spider angioma" at Dorland's Medical Dictionary
^ ^a ^b Nevus Araneus at eMedicine
^ http://jama.jamanetwork.com/article.aspx?articleid=1355997
^ Li CP, Lee FY, Hwang SJ, et al. (1999). "Spider angiomas in patients with liver cirrhosis: role of alcoholism and impaired liver function". Scand. J. Gastroenterol. 34 (5): 520–3. doi:10.1080/003655299750026272. PMID 10423070.
^ Geronemus, R. G. (1991). "Treatment of spider telangiectases in children using the flashlamp-pumped pulsed dye laser". Pediatr Dermatol 8 (1): 61–3. doi:10.1111/j.1525-1470.1991.tb00843.x. PMID 1862028.

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1. 成人における肝硬変：病態、臨床症状、および診断 cirrhosis in adults etiologies clinical manifestations and diagnosis
2. 小児における身体的診察：背部、四肢、神経系、皮膚、およびリンパ節 the pediatric physical examination back extremities nervous system skin and lymph nodes
3. 妊娠中の肌、髪、爪、粘膜 the skin hair nails and mucous membranes during pregnancy
4. 嚢胞性線維症：肝胆道系疾患 cystic fibrosis hepatobiliary disease
5. バッドキアリ症候群：疫学、臨床症状、および診断 budd chiari syndrome epidemiology clinical manifestations and diagnosis

English Journal

Extraordinarily large, giant spider angioma in an alcoholic cirrhotic patient.

Hane H1, Yokota K, Kono M, Muro Y, Akiyama M.
International journal of dermatology.Int J Dermatol.2014 Feb;53(2):e119-21. doi: 10.1111/j.1365-4632.2012.05548.x. Epub 2013 Mar 3.
PMID 23451770

Treatment of superficial vascular lesions with the KTP 532-nm laser: experience with 647 patients.

Becher GL1, Cameron H, Moseley H.
Lasers in medical science.Lasers Med Sci.2014 Jan;29(1):267-71. doi: 10.1007/s10103-013-1330-5. Epub 2013 Apr 30.
Superficial vascular lesions are a common dermatological diagnosis but are often difficult to treat. Numerous lasers (especially the dye laser) and intense pulsed light sources have been used, but there have been very few reports on the effectiveness of the potassium-titanyl phosphate (KTP) laser. W
PMID 24401943

Are the spider angiomas skin markers of hepatopulmonary syndrome?

Silvério Ade O1, Guimarães DC, Elias LF, Milanez EO, Naves S.
Arquivos de gastroenterologia.Arq Gastroenterol.2013 Jul-Sep;50(3):175-9. doi: 10.1590/S0004-28032013000200031.
CONTEXT: Hepatopathies can significantly influence both veins and arteries, these changes may cause some cutaneous stigmas, such as spider angioma (SA) and some systemic vascular changes, such as those observed in hepatopulmonary syndrome (HPS). Based on this common pathophysiological root we can as
PMID 24322187

Japanese Journal

Solitary giant spider angioma with an overlying pyogenic granuloma

OKADA N.
J Am Acad Dermatol 16, 1053-1054, 1987
NAID 30039137479

Related Pictures

★リンクテーブル★

リンク元	「クモ状血管腫」
関連記事	「angio」

「クモ状血管腫」

Spider angioma
	Spider nevus
Classification and external resources
Specialty	cardiology
ICD-10	I78.1 (ILDS I78.11)
ICD-9-CM	448.1
DiseasesDB	12302
MedlinePlus	001095
eMedicine	derm/293
	[edit on Wikidata]

　　[★]

also see くも状血管腫・手掌紅斑
英: vascular spider, spider angioma, spider nevus
同: クモ状母斑 nevus araneus, クモ状血管拡張 spider telangiectasia, 星芒状血管腫 stellar nevus, Sternformige angiom; くも状血管腫

分類

先天性
後天性

妊婦、肝硬変

血中エストロゲンの上昇と関連

「angio」

　　[★]

comb. form.

血管、リンパ管、果皮

[Bolognia-1] Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. (2007). Dermatology: 2-Volume Set. St. Louis: Mosby. pp. 1621–22. ISBN 1-4160-2999-0.

[2] "spider angioma" at Dorland's Medical Dictionary

[emedicine-3] Nevus Araneus at eMedicine

[4] ttp://jama.jamanetwork.com/article.aspx?articleid=1355997

[pmid-5] Li CP, Lee FY, Hwang SJ, et al. (1999). "Spider angiomas in patients with liver cirrhosis: role of alcoholism and impaired liver function". Scand. J. Gastroenterol. 34 (5): 520–3. doi:10.1080/003655299750026272. PMID 10423070.

[6] Geronemus, R. G. (1991). "Treatment of spider telangiectases in children using the flashlamp-pumped pulsed dye laser". Pediatr Dermatol 8 (1): 61–3. doi:10.1111/j.1525-1470.1991.tb00843.x. PMID 1862028.

匿名

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案内

案内

spider angioma