Cerebrospinal fluid abnormalities in developmental and epileptic encephalopathy with a de novo CDK19 variant

Developmental and epileptic encephalopathy (DEE) is a spectrum of neurodevelopmental conditions in which psychomotor delay or regression arises in association with frequent epileptic activity. In the past decade, molecular genetics studies showed that DEE is caused by environmental insults and by genetic factors; several de novo pathogenic variants were also identified.1 The authors are indebted to the patient and her parents. The authors would also like to thank Enago ([enago.jp][1]) for the English language review. [1]: http://www.enago.jp/