Genetic Diseases

Genetic Testing for Spinal Muscular Atrophy (SMA)

SMA is an inherited motor neuron disorder causing progressive muscle weakness.

Genetic Diseases

What is SMA?

Autosomal recessive disease with loss of spinal motor neurons.

Symptoms

Progressive muscle weakness, respiratory and feeding difficulties, motor milestone delay.

Genetic causes

Deletion or mutation of the SMN1 gene.

Inheritance pattern

Autosomal recessive.

Important genes

SMN1, SMN2 (disease modifier).

Who should be tested?

Couples before pregnancy and affected families.

Recommended tests

MLPA for SMN1, carrier screening.

Counseling

PGT-M and specialized prenatal testing are options for carrier couples.

Frequently Asked Questions

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Gene Negar Ayandegan · Genetic Testing for Spinal Muscular Atrophy (SMA)