Progressive brain atrophy and severe neurodevelopmental phenotype in siblings with biallelic COASY variants
American Journal of Medical Genetics Part A, 2023•Wiley Online Library
Biallelic pathogenic variants in the COASY gene have been associated with two distinct
disease phenotypes, that is, COASY‐protein associated neurodegeneration (CoPAN) and
pontocerebellar hypoplasia type 12 (PCH 12). We present two siblings that independently
presented with significant hypotonia and respiratory insufficiency at birth. Comprehensive
genetic testing revealed homozygous variants within COASY, however, the progressive
clinical and neuroradiologic findings described here are unique and have not been …
disease phenotypes, that is, COASY‐protein associated neurodegeneration (CoPAN) and
pontocerebellar hypoplasia type 12 (PCH 12). We present two siblings that independently
presented with significant hypotonia and respiratory insufficiency at birth. Comprehensive
genetic testing revealed homozygous variants within COASY, however, the progressive
clinical and neuroradiologic findings described here are unique and have not been …
Abstract
Biallelic pathogenic variants in the COASY gene have been associated with two distinct disease phenotypes, that is, COASY‐protein associated neurodegeneration (CoPAN) and pontocerebellar hypoplasia type 12 (PCH 12). We present two siblings that independently presented with significant hypotonia and respiratory insufficiency at birth. Comprehensive genetic testing revealed homozygous variants within COASY, however, the progressive clinical and neuroradiologic findings described here are unique and have not been described previously. Magnetic resonance imaging showed progressive diffuse parenchymal loss throughout the bilateral cerebral hemispheres and atrophy of the basal ganglia and brainstem. As such, this article brings forth two additional cases of COASY‐related disorder with abnormal newborn screening acylcarnitine profiles resembling carnitine palmitoyl transferase 1a (CPT1a) deficiency in two siblings who presented at birth with contractures, marked hypotonia and absent respiratory drive.
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