Prenatal Diagnosis for Primary Immunodeficiency Disorders-An Overview of the Indian Scenario

Area of Science:

• Medical Genetics
• Immunology
• Preventive Medicine

Background:

• Primary immunodeficiency (PI) disorders, though individually rare, collectively pose a significant disease burden.
• Prenatal diagnosis (PND) is crucial for primary preventive management in families with a history of PI.
• Genetic counseling and PND services are vital for informed decision-making.

Purpose of the Study:

• To review available prenatal diagnosis services for primary immunodeficiency in affected families.
• To discuss challenges and ethical considerations in genetic counseling for PND.
• To analyze the outcomes of PND services provided over a decade.

Main Methods:

• Mutation detection in the index case.
• Analysis of chorionic villous sampling (CVS) or amniocentesis for PND.
• Phenotypic analysis of cordocentesis samples for late second-trimester PND in specific cases.

Main Results:

• PND services were provided to 112 families over the last decade.
• The presence of an affected fetus was confirmed in 32 families.
• Post-test genetic counseling facilitated informed decision-making for affected families.

Conclusions:

• Prenatal diagnosis is a key component in managing families at risk of primary immunodeficiency.
• Effective genetic counseling is essential for families undergoing PND.
• The study highlights the importance of PND services in reproductive choices for families with PI.