Transient dysarthria and hemiparesis in an adolescent

An adolescent male in his teens had recurrent episodes of transient left lower limb weakness, persisting for three years. These episodes were consistently triggered by specific movements, such as postural changes or movement initiation, occurring multiple times per day. The patient adapted his behaviour to avoid triggering symptoms. Based on the clinical presentation, paroxysmal kinesigenic dyskinesia was diagnosed. Although dysarthria is uncommon in paroxysmal kinesigenic dyskinesia, its presence in this case highlights the condition’s clinical variability. Carbamazepine therapy was initiated, which resulted in a significant reduction in the frequency of episodes. This case underscores the importance of recognising movement-triggered transient motor symptoms, including rare symptoms such as dysarthria, to prevent misdiagnosis and unnecessary testing. Early recognition and treatment can significantly improve outcomes and quality of life in patients with paroxysmal kinesigenic dyskinesia.