Applied research of combined G-banding and array-CGH in the prenatal diagnosis of ultrasonographic abnormalities in fetuses / 中华医学遗传学杂志
Chinese Journal of Medical Genetics
;
(6): 737-742, 2014.
Article
in Chinese
| WPRIM
| ID: wpr-291692
ABSTRACT
<p><b>OBJECTIVE</b>To use combined comparative genome hybridization (array-CGH) and conventional karyotype analysis to study the relationship between ultrasonographic abnormalities of fetuses and chromosomal aberrations.</p><p><b>METHODS</b>One hundred twenty two fetuses with ultrasonographic abnormalities in middle and late trimesters suspected with chromosomal abnormalities were collected between March 2012 and February 2013.</p><p><b>RESULTS</b>The pregnant women had an average age of 31 yr (22-38), among whom 35 were above the age of 35. The average gestational age was 27(+5) weeks (18-37 weeks), and the most common abnormal findings have involved heart, central nervous system and bones. Multiple malformations were found in 49 cases. The success rate of the combined methods was 100%. In 24 (19.7%) of the cases, a chromosomal abnormality was detected. Among all cases, 16 (13.1%) were detected by the combined method (12.3%). Seventeen cases (13.9%) of chromosomal abnormalities and 4 cases (3.3%) of polymorphic variation were detected by karyotype analysis, and 23 cases (8.9%) of abnormalities were detected by array-CGH. Meanwhile, 7 cases (5.7%) of abnormalities were detected by array-CGH, but the results of karyotype analysis were normal. One case (0.8%) with low level of chromosome chimerism detected by the karyotype analysis was missed by array-CGH.</p><p><b>CONCLUSION</b>The results suggested that multiple congenital deformity of the fetus has a strong correlation with chromosomal abnormalities. For fetuses with ultrasonographic abnormalities, array-CGH can improve the detection sensitivity of the chromosomal disease.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Prenatal Diagnosis
/
Diagnostic Imaging
/
Embryology
/
Ultrasonography, Prenatal
/
Chromosome Aberrations
/
Chromosome Banding
/
Gestational Age
/
Chromosome Disorders
/
Diagnosis
/
Comparative Genomic Hybridization
Type of study:
Diagnostic study
Limits:
Adult
/
Female
/
Humans
/
Male
/
Pregnancy
Language:
Chinese
Journal:
Chinese Journal of Medical Genetics
Year:
2014
Type:
Article
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