A Case Series of Novel Monogenic Abnormalities Associated With Developmental Epileptic Encephalopathy With Spike-and-Wave Activation in Sleep.

Background: Developmental and epileptic encephalopathy with spike-and-wave activation in sleep (DEE-SWAS) is a rare neurodevelopmental spectrum of disorders marked by regression associated with spike-and-wave activation in sleep.

Methods: As roughly 10% have a related genetic underpinning, we sought to describe narrative clinical histories of four patients at a single academic medical center with monogenic variants associated with DEE-SWAS. In sharing this case series, we aim to build on recent work investigating genetic DEE-SWAS.

Results: Findings from this case series not only aid in accurate diagnosis and prognosis for our patients but also may provide potential targets for future therapeutic interventions.

Conclusions: This natural history case series also highlights the difficulty in differentiating genetic phenotype from the effects of DEE-SWAS.