A new mutation in the GNAL gene in familial dystonia presenting with mental symptoms.

GNAL mutations (DYT25) have lately been identified as the firstly proven cause of focal adult-onset dystonia. We report here a new mutation in the GNAL gene in two siblings with dystonia. The new mutation is called NM 001,142,339:c.97C > T. Our research emphasizes the possible effects of new mutation on disease risk and the significance of genetic tests for GNAL mutations in confirming the molecular diagnosis.