KMT2B and Dystonia: In 2017, Meyer et al. [15] presented 10 unrelated patients with 19q13.11-q13.12 microdeletions that appeared de novo and varied in size, from 14 to 100 genes, with the smallest region of overlap between these microdeletions including the ZBTB32 and KMT2B genes, the latter being, in the authors’ opinion, responsible for the dystonia symptoms.