老人環
WordNet
- a continuous portion of a circle
- a whitish deposit in the shape of an arc that is sometimes seen in the cornea (同)arcus_senilis
PrepTutorEJDIC
- 『弧』,円弧 / 電弧(2点間を弧状に流れる電流) / 弧を描く / 電弧を生じる
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2014/02/17 12:24:35」(JST)
[Wiki en表示]
Arcus senilis |
Classification and external resources |
Four representative slides of corneal arcus - arcus deposits tend to start at 6 and 12 o'clock and fill in until becoming completely circumferential. There is a thin, clear section separating the arcus from the limbus, known as the lucid interval of Vogt. Image from Zech and Hoeg, 2008.[1]
|
ICD-10 |
H18.4 |
ICD-9 |
371.41 |
OMIM |
107800 |
DiseasesDB |
17120 |
MeSH |
D001112 |
Arcus senilis (or arcus senilis corneae) is a white, gray, or blue opaque ring in the corneal margin (peripheral corneal opacity), or white ring in front of the periphery of the iris. It is present at birth, but then fades; however, it is quite commonly present in the elderly. It can also appear earlier in life as a result of hypercholesterolemia. Arcus senilis can be confused with the limbus sign, which reflects calcium rather than lipid deposits.
Contents
- 1 Alternative names
- 2 Causes
- 3 References
- 4 External links
Alternative names[edit]
It is also called arcus adiposus, arcus juvenilis (when it occurs in younger individuals), arcus lipoides corneae or arcus cornealis; sometimes a gerontoxon.
Causes[edit]
It results from cholesterol deposits in or hyalinosis of the corneal stroma, and may be associated with ocular defects or with familial hyperlipidemia. It is common in the apparently healthy middle aged and elderly; a prospective cohort study of 12,745 Danes followed up for a mean of 22 years found that it had no clinical value as a predictor of cardiovascular disease.[2]
It can be a sign of disturbance in lipid metabolism, an indicator of conditions such as hypercholesterolemia, hyperlipoproteinemia or hyperlipidemia.
Unilateral arcus is a sign of decreased blood flow to the unaffected eye, due to carotid artery disease or ocular hypotony.
People over the age of 60 may present with a ring-shaped, grayish-white deposit of phospholipid and cholesterol near the peripheral edge of the cornea.
Younger people with the same abnormality at the edge of the cornea would be termed arcus juvenilis.
References[edit]
- ^ Zech Jr, LA; Hoeg, JM (2008). "Correlating corneal arcus with atherosclerosis in familial hypercholesterolemia". Lipids in health and disease 7: 7. doi:10.1186/1476-511X-7-7. PMC 2279133. PMID 18331643.
- ^ Christoffersen, M; Frikke-Schmidt, R; Schnohr, P; Jensen, GB; Nordestgaard, BG; Tybjærg-Hansen, A (15 September 2011). "Xanthelasmata, arcus corneae, and ischaemic vascular disease and death in general population: prospective cohort study.". BMJ (Clinical research ed.) 343: d5497. doi:10.1136/bmj.d5497. PMID 21920887. Retrieved 27 November 2012.
External links[edit]
- Photo at kumc.edu
- Photo at hoppingeyeassociates.com
- Photo at apollolipids.org
- Definition at Merriam-Webster Medical Dictionary
UpToDate Contents
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English Journal
- Corneal Biomechanical Properties in Patients With Arcus Senilis.
- Ayhan Z1, Ozturk T, Kaya M, Arikan G, Gunenc U.
- Cornea.Cornea.2016 Jul;35(7):980-2. doi: 10.1097/ICO.0000000000000856.
- PURPOSE: To compare the corneal biomechanical properties and intraocular pressure (IOP) levels in patients with and without arcus senilis (AS).METHODS: Ocular response analyzer measurements were performed on the right eyes of 37 patients with AS (group 1) and 37 control eyes (group 2). Corneal hyste
- PMID 27124777
- Association Between Cholesterol Efflux Capacity and Atherosclerotic Cardiovascular Disease in Patients With Familial Hypercholesterolemia.
- Ogura M1, Hori M2, Harada-Shiba M2.
- Arteriosclerosis, thrombosis, and vascular biology.Arterioscler Thromb Vasc Biol.2016 Jan;36(1):181-8. doi: 10.1161/ATVBAHA.115.306665. Epub 2015 Nov 5.
- OBJECTIVE: Patients with familial hypercholesterolemia (FH) are at high risk for premature atherosclerotic cardiovascular disease (ASCVD), especially because of long-term exposure to high low-density lipoprotein cholesterol levels. It has been reported that low-density lipoprotein-lowering therapy d
- PMID 26543100
- Significance of corneal arcus.
- Raj KM1, Reddy PA1, Kumar VC1.
- Journal of pharmacy & bioallied sciences.J Pharm Bioallied Sci.2015 Apr;7(Suppl 1):S14-5. doi: 10.4103/0975-7406.155765.
- The corneal arcus consists of cholesterol, phospholipids and triglycerides. As serum triglyceride is one of the accurate of lipid metabolic state, greater importance was given, and it was found to be elevated in 72% of patients and a positive correlation with increasing age. This suggests a strong c
- PMID 26015693
Japanese Journal
- RELATION OF AREA OF ARCUS SENILIS, ACHILLES TENDON THICKNESS AND LIPOPROTEIN AND APOPROTEIN VALUES TO CORONARY ANGIOGRAPHIC FINDINGS : Ischemic Heart Disease(I) : I : 48 Annual Scientific Meeting, Japanese Circulation Society
- OHASHI Susumu,HISHIDA Hitoshi,TACHI Keiji,SAKABE Yoshiyuki,KANEKO Kenzo,KONDO Takeshi,NOMURA Masanori,OKAJIMA Satoshi,WATANABE Yoshihiko,MIZUNO Yasushi
- Japanese circulation journal 48(8), 744-745, 1984-08-20
- NAID 110002578296
- 農村(栃木県)の衛生学的研究(III):第4報、茂木町の集団検診(第1~3報)の総括、考按ならびに結論
- 岡田 勇 [他],楯 博,三浦 善憲,大平 修二
- 民族衛生 45(1), 26-37, 1979
- … came to the conclusion with the following results.I On the cephalic, facial, percussive and auscultatory findings1) As to bodily type, a lean and tall type is seen in many males and corpulence or emaciation is seen in many females.2) As to senile baldness, more males are sufferers from it in any age-group with a statistically significant difference.As to white hair, no statistically significant difference between the sexes can be seen in any age-group.3) Arcus senilis is seen in both the males and the females over 40 years …
- NAID 130002027448
- 高年者の血清コレステロール・トリグリセリドに関する疫学的研究:年令, 皮脂厚, 老人環, 血厚, および心電図との関係
- 七田 恵子,大場 京子,芳賀 博,上野 晴美,柴田 博,松崎 俊久,高橋 重郎,斉藤 紀仁
- 日本老年医学会雑誌 14(4), 260-267, 1977
- 東京都養育院老人ホームの老年者 (男子724名, 女子1,239名) 計1,963名を対象として血清コレステロール, トリグリセリドを測定し, 皮脂厚, 老人環, 収縮期血圧, 拡張期血圧, 心電図所見との関連について検討した.1) 血清コレステロール分布はほぼ正規型を呈し, トリグリセリドはやや右方に偏った分布を描いたが対数変換を行うと幾分偏りが是正された.2) 5歳間隔の平均値で血清コレステロ …
- NAID 130003651217
Related Links
- arcus [ahr´kus] (pl. ar´cus) (L.) arch; bow. arcus adipo´sus arcus corneae. arcus cor´neae (arcus cornea´lis) a white or gray opaque ring in the corneal margin; it may be present at birth or appear in childhood (see arcus juvenilis), but ...
- Arcus senilis is a gray arc sometimes visible around the cornea in older adults. ... Arcus senilis (AHR-kus see-NIL-us) and the eye problems caused by high cholesterol are different. Arcus senilis, also known as arcus corneae, is a ...
Related Pictures
★リンクテーブル★
[★]
- 英
- arcus senilis, gerontoxon
- ラ
- corneal arcus
- 同
- 角膜環, 角膜老人環 senile corneal arcus corneal arcus senilis arcus senilis corneae
- 関
- 角膜胎生環
[★]
角膜環、角膜老人環
- 関
- arcus corneae、arcus senilis
[★]
- 関
- AIDS-related complex、lymphadenopathy syndrome