An important randomized, controlled trial of anterior GPi (globus pallidus, pars interna) DBS in 16-19 patients with TS was published \citep{28645853}. Surprisingly, at 3 months there was no significant difference in YGTSS scores between active and sham stimulation groups.
A report from the deep brain stimulation (DBS) group in the Netherlands called attention to side effects over the course of treatment in TS patients with thalamic DBS \citep{28102636}.