SINDROME DE KEARNS SAYRE PDF

Abstract. GOMEZ-NARANJO, Heidy J. et al. Kearns Sayre Syndrome: Report of two cases. Acta Neurol Colomb. [online]. , vol, n.1, pp 3 Mar Objetivo: El síndrome de Kearns-Sayre (SKS) es un trastorno neuromuscular causado por defectos genéticos en el DNA mitocondrial siendo. Kearns-Sayre syndrome is a condition that affects many parts of the body, especially the eyes. The features of Kearns-Sayre syndrome usually appear before.

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Síndrome de Kearns Sayre: reporte de dos casos

Pacing Clin Electrophysiol ; Pediatr Neurol ; A study on 17 patients with documented mitochondrial DNA defects. Executive and visuospatial deficits in patients with chronic progressive external ophthalmoplegia sindrome de kearns sayre Kearns-Sayre syndrome.

D ICD – S DiMauro, M Hirano. KSS results in a pigmentation of the retinaprimarily in the posterior fundus. Most of these mutations are inconsequential; however, a stable, replicative mutant mtDNA is sometimes produced. The Kearns-Sayre syndrome KSS is a mitochondrial disease characterised by the onset of symptomatology before 20 years of age, with a clinical picture consisting of ophthalmoparesis, palpebral sijdrome, pigmentous retinitis, mitochondrial myopathy, and kearhs to sindrome de kearns sayre least one of the following items: The investigators suggested therefore that formal electrophysiologic studies and prophylactic defibrillators be considered in patients with the syndrome.

Located within the mitochondrial matrix, and lacking the efficient repair mechanisms available to nuclear DNA, mtDNA has a relatively high rate of mutation. Executive and visuospatial deficits in patients with chronic progressive external ophthalmoplegia and Kearns-Sayre syndrome. The sinvrome genome encodes the sindrome de kearns sayre information for the 13 polypeptide subunits essential for the process of oxidative phosphorylation. Central nervous system manifestations of mitochondrial disorders.

The affected patient showed ptosis, progressive external ophthalmoplegia, pigmentary changes in the peripheral retina and right bundle block. Very high levels of deleted mtDNA in all tissues are likely to cause Pearson syndrome, in which the dominant feature is pancytopenia. Kearns-Sayre syndrome; mitochondrial disorder; ophthalmoplegia MeSH. AMA Arch Ophthalmol ; Ophthalmological findings in 74 patients with mitochondrial disease.

We remove all identifying information when posting a question to protect your privacy. A publication in by Fischel-Ghodsian et al. Berio A, Piazzi A. Bilateral ptosis and external ophthalmoplegia. Executive and visuospatial deficits sindroms patients with chronic progressive external ophthalmoplegia and Kearns-Sayre syndrome.

Kearns-Sayre Syndrome: Background, Pathophysiology, Epidemiology

Abnormalities may also be demonstrated in muscle biopsy samples using other histochemical studies such as mitochondrial enzyme stains, by electron microscopy, biochemical analyses of the muscle tissue ie electron transport chain enzyme activitiesand by analysis of muscle mitochondrial DNA. Pijl S, Westerberg BD.

Se discuten correlaciones genotipo-fenotipo. Views Read Edit View sindroje. MRI of the brain in the Kearns-Sayre syndrome: Cochlear implantation results in patients with Kearns-Sayre syndrome.

Kearns-Sayre Syndrome

This results in ptosis and ophthalmoplegia respectively. This is one factor involved in the presentation of mitochondrial diseases. Modest night-blindness can be seen in patients with KSS. Symptoms of heart block include syncopeexercise intoleranceand bradycardia. Modified Gomori Trichrome stain showing ragged red fibres. It is not necessary to biopsy an ocular muscle to demonstrate histopathologic abnormalities.

The sindrome de kearns sayre common deletion is 4. Deterioration of Kearns-Sayre syndrome following articaine administration for local anesthesia. Onset is in the first and second decades of life. Initially, imaging studies are often performed to rule out more common pathologies.

Molecular analyses of mitochondrial DNA from the patient included PCR amplification of a region where the common Kearns- Sayre deletion is located and Genotype-Phenotype correlations are discussed.

In KSS, implantation of pacemaker is advised following the development of significant conduction disease, even in asymptomatic patients. Instead, the phenotype appears to be determined by the relative amounts of deleted and wild-type mtDNA.

Report of two cases. An individual should be suspected of having KSS based upon clinical exam findings.

For this reason, several groups propose prophylactic implantation of a definitive pacemaker without performing an electrophysiological study in patients with KSS and sindrome de kears sayre blocks. Imaging studies reveal areas of hypointensity in basal ganglia and midbrain that are not visible after administration of contrast enhancement in computed tomography, and symmetric T2 hyperintensity lesions in these areas in magnetic resonance imaging.

Neuropathology of mitochondrial diseases.