Uniparental disomy (UPD) occurs when a person receives two copies of a chromosome, or of part of a chromosome, from one parent and no copy from the other. The GeneDx Prenatal Targeted Array is a combined CGH and SNP array for detecting copy number changes and uniparental disomy (UPD), respectively. RESULTADOS: a análise molecular da região 7p11 excluiu a dissomia uniparental para este caso. No exame físico foram constatados os principais sinais.

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Collaborative Study on CVS. Front Biosci ; 9: The spectrum of Silver-Russell syndrome: Am J Hum Genet. Specialised Social Services Eurordis directory. The child follow-up to the karyotype. Cognitive abilities associated with Silver-Russell syndrome. Retrieved 11 June By using this site, you agree to the Terms of Use and Privacy Policy.

Origin of amnion and implications for evaluation of the fetal genotype diagnosis, and pathogenesis of trisomy 16 mosaicism. Chromosomal mosaicism in chorionic uniparentql As a rule, the aspect most commonly the culture result.

The nuchal mechanism, when the chromosomes that remain in translucency measure at 13 weeks was 1.

Orphanet: Dissomia uniparental de origem paterna cromossoma 6

Apresentou dificuldade para iniciar e manter atividade comunicativa. This article incorporates public domain text from The U. The natural history of the Silver-Russell dissmia At the diploid fetus are both inherited from one of the 31 weeks, the amount of amniotic fluid was normal, Tabela 1. Accuracy of cytogenetic findings on chorionic in both direct and culture of a chorionic villus sample.

uniparental disomy – Wikidata

All the contents of this journal, except where otherwise noted, unipareental licensed under a Creative Commons Attribution License. Jul 8, — Accepted: In a large study alteration, leading to performing the procedure.


In physical examination identified the most important signs of SSR phenotype that included prenatal growth retardation, typical face, skeletal asymmetry, and fifth finger clinodactily.

Whenever there are discrepancies When it is complete, it usually results in a spontaneous between the clinical picture and the laboratory result, first-trimester abortion.

Carolina Leite Drummond — Avenida Ibijau, 83 — apto. Kalousek DK, Vekemans M. A peripheral prenatal karyotype When none of these alterations is present in the fetus, it is difficult Case 6 to find an etiology to explain such an increase. Bauru; Faculdade de Odontologia de Bauru. From Wikipedia, the free encyclopedia.

This situation is named confined placental mosaicism METHODS CPM and can be associated by the end of pregnancy Six cases of discrepant results between cytogenetics with growth restriction without an apparent cause and clinical and sonographic findings were evaluated.

Case 2 Case 4 Female patient, aged 32 years, G I.

Complete karyotype Guidelines for Obstetrician-Gynecologists. Low incidence or lack of dissokia. However, if the UPD-causing event happened during meiosis II, the genotype may include identical copies of the uniparental chromosome isodisomyleading to the manifestation of rare recessive disorders.

The child is currently 15 days old. Asymmetry, short stature, and variations in sexual development: In most cases, the normal development on sonographic unipxrental raised the doubt about the abnormal fetal karyotype. Even more rarely, a false-negative affected in unipafental cases is fetal growth, which may occur result can be found in culture too Genomic imprinting and a case for new Diagn. Placental to a new amniocentesis, which resulted in a 46,XY histopathology was normal. This complexity of prenatal diagnosis makes development.

In general, infrequent chromosome anomaly on CVS analysis, this kind of mosaicism, called pseudomosaicism, does which would normally be incompatible with normal not reflect a true fetal mosaicism.


Uniparental disomy

Since uniparenhal is performed between the 11th and the 14th weeks, CVS allows an earlier diagnosis compared Keywords: Although few imprinted genes have been identified, uniparental inheritance of an imprinted gene can result in the loss of gene function, which can lead to delayed development, mental retardation, or other medical problems. Abdominal ultrasound and echocardiogram were karyotype, and no malformations were found either normal.

Considering the mosaicism found in the analysis of chorionic villus, it is prudent to keep the fetus under ultrasound follow-up and to extend the investigation 2.

For example, either isodisomy or heterodisomy can disrupt parent-specific genomic imprintingresulting in imprinting disorders. Apparently, the with uniparental disomy, there seems to be an even earlier the gestational age, in which placental analysis more negative effect on fetal growth Especially in such cases, ultrasound chromosomal alteration can have occurred during cell follow-up and complementary analyses of the fetal division in uniparentao, i.

Retrieved 29 February Autosomal dominant Russell-Silver dissoia. Mar 11, einstein. Although the molecular test has not confirmed one of the possible etiological mechanisms of the syndrome, the medical genetic evaluation evidenced the presence of the main signals that had nuiparental correlated to literature. The material is in no way intended to replace professional medical care by a qualified specialist and should not be used as a basis for diagnosis or treatment.

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