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Fetal renal defects: associated malformations and chromosomal defects
K H Nicolaides1, H H Cheng, A Abbas
1Harris Birthright Research Centre for Fetal Medicine, King's College Hospital, London, UK.
Fetal Diagnosis and Therapy
|January 1, 1992
Summary
Fetal renal defects are linked to a 12% rate of chromosomal abnormalities. The risk significantly increases with additional malformations, highlighting the importance of karyotyping in prenatal diagnosis.
Area of Science:
- Prenatal Diagnosis
- Medical Genetics
- Fetal Medicine
Background:
- Renal defects are common fetal anomalies.
- Chromosomal abnormalities can lead to various developmental issues.
Purpose of the Study:
- To investigate the incidence and patterns of chromosomal abnormalities in fetuses with renal defects.
- To assess the risk factors associated with these abnormalities.
Main Methods:
- Blood karyotyping was performed on 682 fetuses with diagnosed renal defects between 1985 and 1990.
- Analysis included different types of renal anomalies such as hydronephrosis, multicystic dysplasia, and renal agenesis.
Main Results:
- An overall incidence of 12% for chromosomal abnormalities was observed.
- Females exhibited a higher incidence (18%) compared to males (10%).
- The risk of chromosomal abnormalities was three times higher for isolated renal defects and thirty times higher with additional malformations.
Conclusions:
- Fetal renal defects are associated with a significant risk of chromosomal abnormalities.
- Karyotyping is crucial for fetuses with renal defects, especially when additional malformations are present.
- Specific patterns of chromosomal abnormalities correlate with distinct renal defect types.