Chromosomal microarray in prenatal diagnosis: case studies and clinical challenges.

Area of Science:

• Genetics
• Prenatal Diagnostics
• Medical Technology

Background:

• Chromosomal microarray analysis (CMA) is a key diagnostic tool for pediatric patients with congenital anomalies, developmental, or intellectual disabilities.
• CMA demonstrates a higher detection rate of chromosomal abnormalities than conventional karyotyping in both pediatric and prenatal settings.
• Prenatal CMA is particularly valuable in evaluating fetuses presenting with multiple ultrasound anomalies.

Purpose of the Study:

• To explore the diagnostic yield and challenges of implementing chromosomal microarray analysis (CMA) in prenatal care.
• To address issues related to isolated CMA findings and variants of uncertain significance in the prenatal context.
• To illustrate the risks, benefits, limitations, and optimal integration of CMA into prenatal diagnostics through clinical case examples.

Main Methods:

• Review of clinical cases involving prenatal chromosomal microarray analysis.
• Analysis of diagnostic yield based on fetal phenotypes, particularly ultrasound anomalies.
• Evaluation of variants of uncertain significance and isolated findings from CMA.

Main Results:

• Prenatal CMA shows the highest diagnostic yield when applied to fetuses with multiple ultrasound anomalies.
• Challenges exist in interpreting isolated CMA findings or variants of uncertain significance.
• The utility of CMA necessitates a thorough evaluation of associated risks, benefits, and limitations.

Conclusions:

• Chromosomal microarray analysis is a powerful tool in prenatal diagnostics, especially for fetuses with multiple anomalies.
• Interpreting isolated findings and variants of uncertain significance requires careful clinical correlation and risk-benefit assessment.
• Optimal incorporation of CMA into prenatal care involves understanding its limitations and benefits for informed decision-making.