Autosomal dominant focal dystonia, DYT25 type

Autosomal dominant focal dystonia, DYT25 type (also called GNAL-related dystonia or DYT-GNAL) is a rare movement disorder caused by changes in the GNAL gene. Dystonia means that muscles contract involuntarily, causing twisting or repetitive movements and abnormal postures that a person cannot control. In DYT25, the dystonia typically starts in one part of the body — most often the neck (called cervical dystonia or torticollis), the face, or the vocal cords (laryngeal dystonia). Over time, it may spread to involve nearby body regions, but it usually does not become generalized to the whole body. Symptoms most commonly begin in adulthood, often between the ages of 20 and 40, though onset can vary. The neck is the most frequently affected area, leading to abnormal head positions, pain, and stiffness. When the voice box is involved, speech may become strained or breathy. Some people also develop writer's cramp or other task-specific hand dystonia. There is currently no cure for DYT25. Treatment focuses on managing symptoms. Botulinum toxin (Botox) injections into the affected muscles are the most effective and widely used therapy. Oral medications such as anticholinergics (like trihexyphenidyl), muscle relaxants, and benzodiazepines may also help. In more severe or medication-resistant cases, deep brain stimulation (DBS) surgery targeting the globus pallidus internus has shown benefit. Physical therapy and speech therapy can also play supportive roles depending on which body areas are affected.

Bring these to your next appointment

• Q1.Which specific muscles are affected by my dystonia, and is it likely to spread to other areas?,Would botulinum toxin injections be a good first treatment for me, and how often would I need them?,Should I have genetic testing for the GNAL gene, and should my family members be tested too?,Am I a candidate for deep brain stimulation if other treatments don't work well enough?,What oral medications might help, and what side effects should I watch for?,Are there physical therapy exercises or techniques that can help manage my symptoms?,How can I manage the emotional and psychological impact of living with dystonia?

Common questions about Autosomal dominant focal dystonia, DYT25 type