Manifestações oftalmológicas de Síndrome de Klippel Trenaunay / Ophthalmological manifestation of the Klippel Trenaunay Syndrome

RESUMO A Síndrome de Klippel-Trenaunay (SKT) é uma doença congênita rara, com maior prevalência no sexo masculino e incidência de 2-5:100.000. Apresenta-se, na forma clássica, como a tríade de manchas vinho porto, hipertrofia de membros e malformação venosa e/ou linfática. O diagnóstico é essencialmente clínico e devido à complexidade da síndrome, de natureza progressiva e ampla variedade de apresentações clínicas, os pacientes devem ser tratados de forma individualizada por uma equipe multidisciplinar. Alterações oftalmológicas associadas à SKT incluem anormalidades vasculares da órbita, íris, retina, coroide e nervo óptico. Relato de caso: Paciente de 23 anos, sexo feminino, portadora de SKT, em acompanhamento no Centro da Visão - Universidade Federal do Paraná, com queixa de diminuição da acuidade visual em olho direito. A paciente apresentava manchas vinho porto em dimidio direito e hipertrofia de membros ipsilateral. Foi diagnosticado glaucoma e realizados exames complementares oftalmológicos a fim de avaliar o grau de comprometimento dos campos visuais e o fundo de olho. A visão com a melhor correção foi de 20/100 OD e foi de 20/20 OE. À fundoscopia, constatou-se aumento da escavação do nervo óptico à direita - 0,75 x 0,90 mm. Optou-se por tratamento clínico com Cloridrato de Dorzolamida, Latanoprosta, Brimonidina e Timolol, com bons resultados a longo prazo - a tonometria de aplanação mostrou 19 mmHg OD e 15 mmHg OE, apesar da dificuldade na estabilização da doença. Conclusão: Relatos demonstram que os resultados dos tratamentos clínico e cirúrgico do glaucoma em associação à SKT são insatisfatórios quando comparados a outros tipos de glaucoma - o controle clínico não é possível em cerca de 1/3 dos pacientes, e o manejo cirúrgico tem alto índice de complicações. São necessários estudos mais expressivos que estabeleçam a correlação entre glaucoma e SKT e embasem o tratamento de escolha.

ABSTRACT The Klippel-Trenaunay Syndrome (KTS) is a rare congenital disease, which the prevalence is higher in males, and its incidence of 25:100,000. It is presented in its classic form as the triad of port-wine stains, enlarged limbs and venous and / or lymphatic malformation. The diagnosis is essentially clinical and due to the complexity of the syndrome, the progressive characteristic and the wide variety of clinical presentations, a multidisciplinary team should treat patients individually. The ocular changes associated with KTS include vascular, orbit, iris, retina, choroid and optic nerve abnormalities. Case report: A 23-year-old female patient, carrier KTS, being followed at Vision Center - Federal University of Paraná, complaining of decreased visual acuity in the right eye. The patient had port-wine stains in right hemibody and hypertrophy of ipsilateral members. Glaucoma was diagnosed and eye exams were performed to assess the degree of impairment of visual fields and fundus. The best correction was checked at 20/100 OD and 20/20 OS. At fundoscopy, there was increased excavation of the optic nerve right - 0.75 x 0.90 mm. Clinical treatment was chosen with Dorzolamide Hydrochloride, Latanoprost, Brimonidine and Timolol, presenting good long-term results - the tonometry showed 19 mmHg OD and 15 mmHg OS, despite the difficulty in stabilizing the disease. Conclusion: Reports have shown that the results of clinical and surgical treatments of glaucoma in association with KTS are unsatisfactory compared to other types of glaucoma - clinical control is not possible in about 1/ 3 of patients and the surgical management has a high rate of complications. Significant studies are needed to establish the correlation between glaucoma and KTS, and base the treatment of choice.

Lymphatic and other vascular malformative/overgrowth disorders are caused by somatic mutations in PIK3CA.

OBJECTIVES: To test the hypothesis that somatic phosphatidylinositol-4,5-bisphospate 3-kinase, catalytic subunit alpha (PIK3CA) mutations would be found in patients with more common disorders including isolated lymphatic malformation (LM) and Klippel-Trenaunay syndrome (KTS). STUDY DESIGN: We used next generation sequencing, droplet digital polymerase chain reaction, and single molecule molecular inversion probes to search for somatic PIK3CA mutations in affected tissue from patients seen at Boston Children's Hospital who had an isolated LM (n = 17), KTS (n = 21), fibro-adipose vascular anomaly (n = 8), or congenital lipomatous overgrowth with vascular, epidermal, and skeletal anomalies syndrome (n = 33), the disorder for which we first identified somatic PIK3CA mutations. We also screened 5 of the more common PIK3CA mutations in a second cohort of patients with LM (n = 31) from Seattle Children's Hospital. RESULTS: Most individuals from Boston Children's Hospital who had isolated LM (16/17) or LM as part of a syndrome, such as KTS (19/21), fibro-adipose vascular anomaly (5/8), and congenital lipomatous overgrowth with vascular, epidermal, and skeletal anomalies syndrome (31/33) were somatic mosaic for PIK3CA mutations, with 5 specific PIK3CA mutations accounting for ∼ 80% of cases. Seventy-four percent of patients with LM from Seattle Children's Hospital also were somatic mosaic for 1 of 5 specific PIK3CA mutations. Many affected tissue specimens from both cohorts contained fewer than 10% mutant cells. CONCLUSIONS: Somatic PIK3CA mutations are the most common cause of isolated LMs and disorders in which LM is a component feature. Five PIK3CA mutations account for most cases. The search for causal mutations requires sampling of affected tissues and techniques that are capable of detecting low-level somatic mosaicism because the abundance of mutant cells in a malformed tissue can be low.

Síndrome de Klippel-Trenaunay-Weber: presentación de un caso / Klippel-Trenaunay-Weber syndrome: a case report

Se presentan las características oftalmológicas y clínicas de una paciente que se concluyó como portadora de síndrome Klippel-Trenaunay. Este se incluye dentro de los síndromes neurocutáneos con afección vascular. Es de presentación poco frecuente (1/27 500 recién nacidos) y no bien conocido. Posee 3 características fundamentales que lo distinguen: angioma o nevus flammeus, hipertrofia asimétrica de tejidos blandos y várices. En nuestra paciente se observan 2 de estas alteraciones asociadas a otras anomalías ocasionales como son glaucoma y melanosis escleral bilateral

[Association on Sturge Weber and Klippel Trenaunay Weber syndromes. Apropos of 2 cases]. / Asociación de los síndromes de Sturge-Weber y Klippel-Trenaunay-Weber. A propósito de dos casos.

The present paper describes two patients with Sturge-Weber and Klippel Trénaunay-Weber syndromes. Some etiopathogenic factors are analyzed. We suggest that the association of both diseases in the same patient may be due to a single autosomal dominant gene.