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1.
Rev. bras. oftalmol ; 80(6): e0050, 2021. graf
Article Dans Portugais | LILACS | ID: biblio-1351860

Résumé

RESUMO A íris é responsável pela cor dos olhos. Ela ainda realiza o controle da quantidade de luz que penetra no olho pela pupila. Variações nos genes de cada indivíduo, além da quantidade e da qualidade de melanina na íris, determinam a cor dos olhos. A heterocromia é caracterizada por diferenças na coloração da íris de um mesmo indivíduo, sendo, na maioria das vezes, benigna. Existem basicamente três tipos de heterocromia de íris: central, setorial e completa. A heterocromia de íris pode ter como causa alterações genéticas e congênitas, relacionadas ou não a síndromes específicas, como a de Sturge-Weber, a de Waardenburg, a de Parry-Romberg e a de Horner congênita. Há também causas adquiridas, como doenças ou lesões, trauma ocular e corpos estranhos intraoculares, uso de certas medicações tópicas, siderose ocular, irites ou uveítes como a síndrome uveítica de Fuchs, dentre outras. Diante de um paciente com heterocromia de íris, deve-se entender o contexto e o curso clínico desse sinal, pois pode se tratar de uma alteração de pigmentação benigna ou existir uma doença base em curso, que requer terapêutica específica. Este artigo de revisão de literatura visa abordar as principais etiologias relacionadas à heterocromia de íris, além de discorrer sobre a anatomia e a fisiologia da coloração iridiana e sobre a fisiopatologia de suas possíveis alterações.


ABSTRACT The iris is responsible for eye color and controls the amount of light that enters the eye through the pupil. Variation in each individual's genes, besides the quantity and quality of melanin in the iris, determine eye color. Heterochromia is characterized by different colors of irises in the same individual, and it is benign in most cases. There are basically three types of heterochromia: central, partial and complete. Heterochromia can be caused by genetic and congenital alterations, which may or may not be related to specific conditions, such as Sturge-Weber syndrome, Waardenburg syndrome, Parry-Romberg syndrome and congenital Horner syndrome. It may be associated to acquired causes like diseases or injuries, such as eye trauma and intraocular foreign bodies, use of some topical medications, ocular siderosis, iritis or uveitis, such as Fuchs´ uveitis, among others. When assessing a patient with heterochromia, one must understand the context and clinical course of this signal, since it may be a benign pigmentation disorder or there may be an underlying disease, which requires specific therapy. This literature review article was set out to address the main etiologies related to heterochromia, in addition to describing the anatomy and physiology of the iris color and the pathophysiology of possible alterations.


Sujets)
Humains , Épithélium pigmentaire de l'oeil/malformations , Troubles de la pigmentation/étiologie , Maladies de l'iris/étiologie , Troubles de la pigmentation/génétique , Prostaglandines F synthétiques/effets indésirables , Syndrome de Waardenburg/complications , Couleur des yeux , Syndrome de Sturge-Weber/complications , Iridocyclite/complications , Corps étrangers oculaires/complications , Syndrome de Claude Bernard-Horner/complications , Iris/malformations , Naevus de Ota/complications , Maladies de l'iris/génétique , Mélanome/complications
3.
Rev. méd. Chile ; 127(2): 206-10, feb. 1999. ilus
Article Dans Espagnol | LILACS | ID: lil-243781

Résumé

We report a 39 years old male presenting with an intense hemicrania pain in the tract of the carotid artery and Claude Bernard Horner syndrome. The patient had also a high blood pressure. Magnetic resonance imaging demonstrated a left carotid artery fibrodysplastic disease. Conventional angiography of 4 cerebral vessels showed a dissection of the left carotid artery and fibromuscular dysplasia of the left vertebral artery. Renal angiography showed a stenosis and occlusion of renal artery with radiological exclusion of right kidney. On the left side there was a stenosis and occlusion of segmental branches. The diagnostic importance of Claude Bernard Horner syndrome and the need to study renal artery involvement when carotid dissection is accompanied with high blood pressure, is highlighted


Sujets)
Humains , Mâle , Adulte , Artère rénale , Dysplasie fibromusculaire/diagnostic , Artère carotide interne , Aténolol/usage thérapeutique , Ticlopidine/usage thérapeutique , Angiographie , Artériopathies carotidiennes , Doxazosine/usage thérapeutique , Dysplasie fibromusculaire/complications , Migraines/étiologie , Hypertension artérielle/complications , Hypertension artérielle/traitement médicamenteux , Syndrome de Claude Bernard-Horner/complications
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