This protocol addresses the initial management of patients with early-onset dystonia in whom no alternative underlying diagnosis has been identified — a well-defined clinical situation with a specific first-line recommendation supported by evidence-based guidelines.
Early-onset dystonia without an alternative diagnosis is a recognised presentation in which a standardised first step is indicated before further diagnostic or therapeutic escalation. Guidelines are explicit that this population requires a structured initial intervention regardless of aetiology.
A levodopa therapeutic trial is the recommended initial step in this setting. The complete protocol — including the approach to administration, criteria for assessing response, and the pathway depending on outcome — is available in the full structured regimen.
DOI: 10.1111/j.1468-1331.2010.03042.x
A diagnostic levodopa trial is warranted in every patient with early-onset dystonia without an alternative diagnosis (good practice point).
Hence, the practical recommendation still remains that every patient with early-onset dystonia without an alternative diagnosis should have a trial with levodopa.