COG6-CDG is a rare autosomal recessive disease of congenital disorders of glycosylation (CDG) caused by deficiency of subunit 6 of the conserved oligomeric Golgi complex (COG6), which is characterized by growth retardation, developmental disability, microcephaly, liver and gastrointestinal disease, recurrent infections and hypohidrosis/hyperthermia.
In spite of clinical variability, we delineate the core features of COG6-CDG i.e. liver involvement (9/10), microcephaly (8/10), developmental disability (8/10), recurrent infections (7/10), early lethality (6/10), and hypohidrosis predisposing for hyperthermia (6/10) and hyperkeratosis (4/10) as ectodermal signs.