Prenatal diagnosis and genetic analysis of two cases of Turner syndrome due to isodicentric Xp11.22 / 中华医学遗传学杂志
Chinese Journal of Medical Genetics
;
(6): 368-373, 2023.
Artigo
em Chinês
| WPRIM
| ID: wpr-970935
ABSTRACT
OBJECTIVE@#To explore the genetic characteristics of idic(X)(p11.22) in Turner syndrome (TS).@*METHODS@#Two fetuses suspected for sex chromosome abnormalities or ultrasound abnormalities were selected from Chengdu Women's and Children's Central Hospital in October 2020 and June 2020, and amniotic fluid samples were collected for G-banded chromosomal karyotyping analysis, chromosomal microarray analysis (CMA), and fluorescence in situ hybridization (FISH).@*RESULTS@#The two fetuses were respectively found to have a karyotype of 45,X[47]/46,X,psu idic(X)(p11.2)[53] and 46,X,psu idic(X)(p11.2). CMA found that both had deletions in the Xp22.33p11.22 region and duplications in the p11.22q28 region. FISH showed that the centromeres in both fetuses had located on an isochromosome.@*CONCLUSION@#The combination of karyotyping analysis, FISH, and CMA is useful for the delineation of complex structural chromosomal aberrations. High-resolution CMA can accurately identify chromosomal breakpoints, which can provide a clue for elucidating the mechanism of chromosomal breakage and rearrangement.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Diagnóstico Pré-Natal
/
Aberrações dos Cromossomos Sexuais
/
Síndrome de Turner
/
Centrômero
/
Hibridização in Situ Fluorescente
Limite:
Feminino
/
Humanos
/
Gravidez
Idioma:
Chinês
Revista:
Chinese Journal of Medical Genetics
Ano de publicação:
2023
Tipo de documento:
Artigo
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