LRRK2 and Parkinson disease: A 71‐year‐old male, Caucasian patient with the monogenetic form of Parkinson's disease (PD), caused by a heterozygote mutation in the leucine‐rich‐repeat‐kinase‐2 (LRRK‐2) gene with severe motor fluctuations (Hoehn and Yahr Stage III, off medication motor unified PD rating scale [UPDRS] part III 51 points, levodopa equivalent daily dose [LEDD 1246 mg]), underwent bilateral implantation of electrodes in the subthalamic nucleus (STN) for DBS (device: Medtronic Percept PC with SenSight directional leads).