Jaw-opening dystonia (JOD) is an unusual manifestation of Parkinson’s disease (PD). Response to botulinum toxin or deep brain stimulation (DBS) has recently been reported in several cases of severe JOD that appeared in on-periods or off-periods [
1,
2]. We report the case of a patient with a 14-year history of PD who presented with refractory JOD that could be considered off-, and on- or biphasic-dystonia, that showed significant improvement following treatment by FOslevodopa-foscarbidopa Continuous Subcutaneous (FOCS) infusion. …