Story perspectives

Understanding IgAN: Genetic Risks and Environmental Influences

10/13/2025

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Summary

Story summary

Immunoglobulin A nephropathy (IgAN), also called Berger disease, is a kidney condition caused by buildup of immunoglobulin A.
Most cases are sporadic, though about 10% are familial, with heritability estimated at 40–50% and autosomal dominant.
Environmental factors like illness and stress can influence gene expression.
Risk factors include being male, aged 10–40, and specific ancestry or medical conditions.
Genetic counseling is recommended because no single test can definitively diagnose IgAN.

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Story summary

Immunoglobulin A nephropathy (IgAN), also called Berger disease, is a kidney condition caused by buildup of immunoglobulin A.
Most cases are sporadic, though about 10% are familial, with heritability estimated at 40–50% and autosomal dominant.
Environmental factors like illness and stress can influence gene expression.
Risk factors include being male, aged 10–40, and specific ancestry or medical conditions.
Genetic counseling is recommended because no single test can definitively diagnose IgAN.