GBA1 and Parkinson disease: Existing literature has provided some guidance,75, 76 but greater clarity is required to enhance the clinical utility of GBA1 testing and clarify counseling guidelines defining and explaining (a) PD risk with specific GBA1 variants; (b) family counseling specifically in prenatal tests; and lastly, but not least, (c) GD counseling in incidental findings of homozygotes/compound heterozygotes.