Common brain cyst and neurodevelopmental disorders share genetic drivers

Often an incidental finding on brain scans looking for trauma or other neurological conditions, arachnoid cysts (ACs) are small, fluid-filled sacs within the arachnoid membrane, one of three layers protecting the brain and spinal cord. They often don’t cause noticeable symptoms; however, when they do, patients most commonly report headaches, seizures, developmental delays, and other, often vague neurological symptoms.

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