What genetic testing is available?
Invitae Corp Hereditary Spastic Paraplegia (HSP) panel has 78 genes on it, and those genes are known to cause 67 different types of HSP or related disorders.
The Athena Diagnostics HSP panel, Comprehensive Evaluation has 24 genes on it, and the associated disorders are not specified. Athena also offers 9 related sub-panels for different HSP presentations (recessive, dominant, common, etc).
Both companies let you order any gene on the panel on its own.
As more genes are discovered, it is hopeful that such information will lead to greater availability of testing. Genetic counselors can be found at many major medical centers or by contacting the National Society of Genetic Counselors at (610) 872-7608. Gene tests can be used for prenatal testing.