Heterocromia de íris: uma revisão das condições que podem afetar a pigmentação iridiana / Heterochromia: a review of conditions that may affect iris pigmentation

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.

Pulsatile varicose veins: an uncommon presentation of a common condition / Varizes pulsáteis: uma apresentação incomum de uma condição comum

Abstract Varicose veins of the lower limbs are common. However, pulsatile varicose veins are unusual. They could be an indicator of a sinister underlying pathology, such as severe cardiac dysfunction. It is easy to miss these rare cases during clinical workup, which can result in futile treatment with potentially dangerous consequences. In this report, we describe 2 cases of pulsatile varicose veins that highlight different etiologies and management strategies for this condition.

Resumo Varizes dos membros inferiores são comuns. Entretanto, varizes pulsáteis são raras, podendo ser indicadoras de uma patologia subjacente sombria como disfunção cardíaca grave. É fácil deixar passar esses casos raros durante exames clínicos, o que pode resultar em tratamento fútil com consequências potencialmente perigosas. Neste relato, descrevemos dois casos de varizes pulsáteis que evidenciam as diferentes etiologias e estratégias de manejo para essa condição.

Klippel-Trenaunay and Parkes-Weber syndromes: two case reports / Síndromes de Klippel-Trenaunay e Parkes-Weber: dois relatos de caso

Abstract Parkes-Weber syndrome is a congenital vascular disease that comprises capillary, venous, lymphatic, and arteriovenous malformations. Although Parkes-Weber syndrome is a clinically distinct entity with serious complications, it is still frequently misdiagnosed as Klippel-Trenaunay syndrome, which consists of a triad of malformations involving the capillary, venous, and lymphatic vessels, without arteriovenous fistulas. Both syndromes are generally diagnosed with Doppler ultrasound and confirmed by magnetic resonance angiography. The aim of this study is to describe one case of Klippel-Trenaunay syndrome, in a 36-year-old patient, and one case of Parkes-Weber syndrome, in a 21-year-old patient. We review the literature in order to discuss the possible causes and consequences of these diseases related to venous hypertension and angiodysplasia, taking a clearer approach to their differences, and discussing their treatment.

Resumo A síndrome de Parkes-Weber é uma doença vascular congênita que consiste em malformações capilares, venosas, linfáticas e arteriovenosas. Embora seja uma entidade clinicamente distinta com complicações graves, essa síndrome ainda é frequentemente diagnosticada erroneamente como síndrome de Klippel-Trenaunay, que consiste em uma tríade de má formação nos vasos capilares, venosos e linfáticos, sem fístula arteriovenosa. Ambas as síndromes são geralmente diagnosticadas através de ultrassom Doppler e confirmadas pela angiografia por ressonância magnética. O objetivo deste estudo é descrever um caso de síndrome de Klippel-Trenaunay em um paciente de 36 anos de idade e um caso de síndrome de Parkes-Weber em uma paciente de 21 anos. A literatura foi revisada com o objetivo de discutir as possíveis causas e consequências dessa doença e sua associação à hipertensão venosa e angiodisplasia. O presente trabalho também levanta discussão a respeito das diferenças sintomatológicas de ambas as síndromes e seus respectivos tratamentos.

Angiomatosis encefalotrigeminal o síndrome de Sturge-Weber. A propósito de un caso / Encephalotrigeminal angiomatosis or Sturge-Weber syndrome. A propos of a case

El síndrome de Sturge-Weber consiste, en su forma completa, en la asociación de anomalías cerebrales, cutáneas y oculares. Desde el punto de vista clínico, se caracteriza por una mancha color vino en la cara, epilepsia, retraso mental, otras manifestaciones neurológicas deficitarias y glaucoma. Se presentó el caso de un paciente de 9 años de edad, masculino, piel negra, producto de parto eutócico, con peso de 4 200 g y antecedentes patológicos perinatales de cianosis, constatándose desde el nacimiento varios hemangiomas faciales. Al examen físico se confirma en cara y cráneo, una frente huidiza con presencia del hemangioma facial o hemangioma coroideo, glaucoma unilateral izquierdo, micrognatia. Se precisó mala oclusión dentaria, y en las extremidades superiores una clinodactilia del quinto dedo. Además, tiene el tronco asimétrico, retraso mental severo y aparecen cuadros convulsivos tónico-clónicos que repiten frecuentemente. Teniendo en cuenta todos estos elementos se comienza a sospechar el posible diagnóstico de un síndrome de Sturge-Weber (AU).

The Sturge-Weber syndrome is, in its complete form, the association of ocular, cutaneous and cerebral anomalies. From the clinical point of view, it is characterized by a wine-color spot on the face, epilepsy, mental retardation, other neurological deficit manifestations and glaucoma. We presented the case of a male, black patient, aged 9 years, who was born by eutocic delivery, with 4 200 g weight, and perinatal symptoms of cyanosis, finding several facial hemangioma from the moment of birth. At the physical examination, it was confirmed on the face and crania, evasive forehead with facial hemangioma or choroidal hemangioma, left unilateral glaucoma, micrognathia. Dental malocclusion was stated and clinodactyly of the fifth finger. Besides that, he has an asymmetric trunk, severe mental retardation and tonic-clonic convulsive episodes frequently repeated. Taking into account all these elements we began to suspect the possible diagnosis of a Sturge-Weber syndrome (AU).

Congenital Glaucoma from Sturge-Weber Syndrome: A Modified Surgical Approach

Sturge-Weber syndrome (SWS) is a rare congenital neurocutaneous disorder that causes congenital glaucoma. Previous experiences have shown that drainage procedures are often required to control associated glaucoma. The conventional surgical approach in trabeculectomy carries a significant risk of intraoperative expulsive hemorrhage. Here, we describe a modified approach of the conventional trabeculectomy technique, which may lower the risk of expulsive hemorrhage. A viscoelastic device was employed to maintain a steady intraocular pressure throughout the procedure. Details of the surgical technique and material used are described. One patient with congenital glaucoma associated with SWS underwent a successful trabeculectomy using the modified technique. Postoperative intraocular pressure was successfully reduced and no intraoperative complications occurred. We describe a successful case of trabeculectomy in a SWS case where a modified technique was applied.

Síndrome de Sturge-Weber e suas repercussões oculares: revisão da literatura / Sturge-Weber syndrome and its ocular effects: a review

A síndrome de Sturge-Weber (SSW) é uma desordem neuro-oculocutânea, rara e congênita. Esta facomatose, também conhecida como angiomatose encéfalotrigeminal, é definida pela tríade clássica: hemangiomas cutâneo, meníngeo e ocular. Apesar de sua apresentação típica, formas incompletas não são incomuns. O glaucoma está frequentemente presente e seus mecanismos fisiopatológicos permanecem incertos. Talvez por isso, o manejo clínico e cirúrgico do glaucoma associado à síndrome de Sturge-Weber (GSSW) seja um desafio para a prática oftalmológica, muitas vezes com resultados desapontadores. Apresentamos uma revisão da literatura com ênfase no GSSW, sua patogênese e perspectivas terapêuticas.

The Sturge-Weber syndrome (SWS) is a rare congenital neuro-oculocutaneous disorder. This phacomatosis, also known as encephalotrigeminal angiomatosis, is defined by the classic triad: cutaneous, meningeal and ocular hemangiomas. Despite its typical presentation, incomplete forms are not uncommon. Glaucoma is often present and their pathophysiological mechanisms remain uncertain. Pherhaps this is why the clinical and surgical management of glaucoma associated with Sturge-Weber syndrome (GSSW) is a challenge for the ophthalmic practice, often with disappointing results. We present a literature review with emphasis on GSSW, its pathogenesis and therapeutic perspectives.

Síndrome de Sturge-Weber e diabetes mellitus tipo 1 / The Sturge -Weber syndrome and diabetes mellitus type 1

O estudo relata um caso de síndrome de Sturge-Weber, fundamentando-se nos dados clínicos, diagnósticos e terapêuticos, além de atestar a atípica associação entre essa síndrome e diabetes mellitus tipo 1. A síndrome de Sturge-Weber (síndrom e de Sturge-We ber-Dimitri, angiomatose encéfalo-trigeminal ou encéfalo-facial) consiste em uma anomalia vascular neuro-ectodérmica. Caracteriza-se pelo envolvimento leptomeníngeo, ocular, oral e cutâneo. O prognóstico depende do grau de acometimento neurológico, que geralmente é progressivo.

Overlapping of Sturge Weber syndrome and Klippel Trenaunay Weber syndrome.

Sturge-Weber Syndrome (SWS) occurs sporadically with a frequency of approximately 1 in 50,000. SWS is a mesodermal phakomatosis. Klippel-Trenaunay Weber syndrome (KTWS) is another very rare phakomatosis. Overlap between SWS & KTWS is very rarely encountered. We report a 19 months old boy with features of both SWS and KTWS. The reported case had seizures, port wine haemangioma of the right side of the body, glaucoma of both eyes, subcortical calcification which were consistent with the Sturge Weber Syndrome; on the other hand he had also hypertrophy of the right side of the including the face and limbs, angiomatous skin naevus, varicosities consistent with the KTWS.

An Infantile Case of Sturge-Weber Syndrome in Association with Klippel-Trenaunay-Weber Syndrome and Phakomatosis Pigmentovascularis

Sturge-Weber syndrome can be associated with facial port-wine stains and intracranial calcification, and concurrent Klippel-Trenaunay-Weber syndrome has been reported. Klippel-Trenaunay-Weber syndrome is a rare congenital mesodermal phakomatosis characterized by cutaneous hemangiomas, venous varicosities and soft tissue or bone hypertrophy of the affected extremities. This report is presented a rare case of the Sturge-Weber syndrome in combination with the Klippel-Trennaunay syndrome and phakomatosis pigmentovascularis in a 4-month-old infant. He showed nevus flameus on the right leg and both part of the face and back, leptomeningeal angiomatosis on right hemisphere, hypertrophy of the right leg, hemiconvulsion on the left and also evidences of congenital glaucoma and nevus of Ota. Very rare case combined with these three kinds of phakomatosis has been reported.

Incomplete monosymptomatic leptomeningeal angiomatosis.

Phakomatoses or neurocutaneous syndromes are an important cause of seizures in the pediatric age group. The Sturge-Weber syndrome may affect the eye, skin and brain at different times. The skin lesions need not always manifest. We report a case of isolated affection of the central nervous system in a case of Sturge-Weber syndrome in the absence of ocular or cutaneous manifestations. Our case qualifies to be called incomplete monosymptomatic leptomeningeal angiomatosis.

Asociación de síndromes de Sturge-Weber-Dimitri y Klippel-Trénaunay con nevo de Ota bilateral: una variante de la facomatosis pigmentovascular / An association of Stuge-Weber-Dimitri and Klippel-Trenaunay syndromes with bilateral Ota's naevus: a variant of pigmentovascular phakomatosis

Presentamos un caso de asociación de los síndromes de Sturge-Weber-Dimitri y Klippel-Trénaunay con nevo de Ota bilateral. Además de destacar la infrecuencia de dicha asociación y encuadrarla dentro de las facomatosis pigmentovasculares, se pondera la ubicación nosológica de los nevus flammeus como malformación vascular y se hace una revisión de la clasificación de nevo de Ota

Sturge Weber syndrome with intraoral manifestations. A case report.

A 15 Year old female patient with Sturge Weber Syndrome is presented. This neurocutaneous syndrome consists of angiomatosis of the skin and mucosa as well as the leptomeninges. This case report describes the classic presentation of the syndrome, emphasizing the oral manifestations. The radiographic and CT scan show the typical "tram line" intracranial calcifications. This case report presents a typical case of Sturge Weber Syndrome. It gives the radiological and CT scan findings and the important role played by them in the diagnosis of this syndrome. Emphasis is given to the differentiation of diphenylhydantoin induced gingival hyperplasia from the angiomatous enlargement of the gingiva before any treatment is planned.

Iris neovascularization in Sturge-Weber syndrome.

An unusual case of Sturge-Weber syndrome with raised intraocular pressure is presented. The slit lamp examination and anterior segment fluorescein angiography were consistent with iris neovascularization. Cause and effect relationship of iris neovascularization with glaucoma in this syndrome is discussed.