Lavenstein, BennettMcGurrin, PatrickAttaripour, SanazVial Undurraga, FelipeHallett, Mark2023-12-142023-12-142022Lavenstein B, McGurrin P, Attaripour S, Vial F, Hallett M. KCNN2 Mutation in Pediatric Tremor Myoclonus Dystonia Syndrome with Electrophysiological Evaluation. Tremor Other Hyperkinet Mov (N Y). 2022 Jan 24;12:2. doi: 10.5334/tohm.668https://repositorio.udd.cl/handle/11447/8175Background: Here we combine clinical, electrophysiological, and genetic findings to phenotype an unusual childhood movement disorder in a patient with a rare form of KCNN2 mutation. Case report: A 10-year-old male presented with a clinical syndrome of tremor and myoclonus. Electrophysiology demonstrated muscle activity indicative of myoclonus dystonia, an observation that was not appreciated clinically. Genetic testing revealed an abnormality in the KCNN 2 gene, not present in the parents, known to cause dystonia, as the etiology. Discussion: The value of utilizing noninvasive, electrophysiological recording in pediatric movement disorders expands the precision of diagnosis, potentially informing treatment when correlated with clinical and genetic findings.enGeneticsMyoclonusPhysiologyArticlehttps://doi.org/10.5334/tohm.668