The DESSH Clinic: A New Multidisciplinary Clinic to Address the Complex Needs of Individuals with a Rare Genetic Disorder.

DeSanto-Shinawi (DESSH) syndrome is a rare autosomal dominant condition caused by pathogenic variants in the WAC gene. DESSH syndrome was first identified in 2015 in six patients, but has since been diagnosed in more than 200 individuals worldwide. Patients exhibit a variable degree of developmental delay (DD), intellectual disability (ID), hypotonia, gastrointestinal and eye abnormalities, epilepsy, behavioral difficulties, and recognizable facial features. In order to educate families and address the complex medical needs of the increasing number of patients with DESSH syndrome, we established a new multidisciplinary clinic at Washington University in St. Louis. The first clinic was held in September 2022 and attended by 15 patients and their families. Herein, we report the structure of the clinic and present the main clinical findings of these patients. This pilot experience highlights the utility of a multidisciplinary approach to evaluating individuals with rare genetic diseases and the value of collaborating with family support groups to establish multidisciplinary clinics for these disorders, and provides guidance for future clinic planning.