Alexandra Santana Almansa, Dustin L. Gable, Zoë Frazier, Abigail Sveden, Aisling Quinlan, Maya Chopra, Sara A. Lewis, Michael Kruer, Annapurna Poduri, Siddharth Srivastava

Clinical utility of a genetic diagnosis in individuals with cerebral palsy and related motor disorders

  • Neurology (clinical)
  • General Neuroscience
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AbstractObjectiveEvaluation of the clinical utility of a genetic diagnosis in CP remains limited. We aimed to characterize the clinical utility of a genetic diagnosis by exome sequencing (ES) in patients with CP and related motor disorders.MethodsWe enrolled participants with CP and “CP masquerading” conditions in an institutional ES initiative. In those with genetic diagnoses who had clinical visits to discuss results, we retrospectively reviewed medical charts, evaluating recommendations based on the genetic diagnosis pertaining to medication intervention, surveillance initiation, variant‐specific testing, and patient education.ResultsWe included 30 individuals with a molecular diagnosis and clinical follow‐up. Nearly all (28 out of 30) had clinical impact resulting from the genetic diagnosis. Medication interventions included recommendation of mitochondrial multivitamin supplementation (6.67%, n = 2), ketogenic diet (3.33%, n = 1), and fasting avoidance (3.33%, n = 1). Surveillance‐related actions included recommendations for investigating systemic complications (40%, n = 12); referral to new specialists to screen for systemic manifestations (33%, n = 10); continued follow‐up with established specialists to focus on specific manifestations (16.67%, n = 5); referral to clinical genetics (16.67%, n = 5) to oversee surveillance recommendations. Variant‐specific actions included carrier testing (10%, n = 3) and testing of potentially affected relatives (3.33%, n = 1). Patient education‐specific actions included referral to experts in the genetic disorder (30%, n = 9); and counseling about possible changes in prognosis, including recognition of disease progression and early mortality (36.67%, n = 11).InterpretationThis study highlights the clinical utility of a genetic diagnosis for CP and “CP masquerading” conditions, evident by medication interventions, surveillance impact, family member testing, and patient education, including possible prognostic changes.

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