Kimura et al. \cite{Kimura2019} report on four patients who had undergone thalamic DBS for severe TS. In two, DBS could be completely withdrawn four and seven years after surgery, respectively, without re-increase in tics. This is intriguing and confirms unpublished reports from other centers, including our own (Paris). One major question in this regard is, of course, if the tics observed pre-op were purely organic of if some functional tics were also present. On this topic, Ganos et al. \cite{Ganos2019} have published a landmark review which should be compulsory reading in the field.
Welter et al. 2019 \cite{Welter2019}
Image-based analysis and long-term clinical outcomes of deep brain stimulation for Tourette syndrome: a multisite study \cite{Johnson2019}