Dopa-responsive dystonia (Segawa’s syndrome): description of a clinical case
The authors present a case-report of genetically tested dopa-responsive dystonia, also known as Segawa’s syndrome, in a 32-year-old woman. The genetic forms and their clinical presentation are described. Symptoms began in early childhood with running disability. The patient’s first complaint was twisting of her toes during walking when she was 12 years old. The condition remained stable up to 20 y. o., when some improvement was noticed. Symptoms progressed with involvement of upper limbs at the age of 25. By the age of 32 the patient was directed to Movement Disorders Clinic, where Dopa-responsive dystonia was suspected. The manifestations were dramatically responsive to low doses of levodopa-carbidopa, confirming the diagnosis of dopa-responsive dystonia. The genetic test identified a GCH1 (chr14:55369161G>A) pathogenic mutation.