When do you consider testing with stroke gene panels in young stroke patients?

Broadly, I ask for genetic testing only when I have a specific diagnosis in mind. This testing is not routine in my practice. Examples are:

1. A patient is referred for white matter lesions found on brain MR and a transient neurological episode. The question of CADASIL(NOTCH-3) or related disorders is...

I send for genetic testing on the following young adults:

Those without any other risk factors and recurrent small vessel strokes, white matter changes, microbleeds, and/or history personal or family of any one of the following: early cognitive decline, migraines, and mood disorders for CADASIL (NOT...