Monarch Disease Ontology identifier MONDO_0013281 (COG4-congenital disorder of glycosylation) can be described as follows. COG4-CDG is an extremely rare form of CDG syndrome characterized clinically in the single reported case to date by seizures, some dysmorphic features, axial hyponia, slight peripheral hypertonia and hyperreflexia. Also known as: CDG syndrome type IIj, CDG-IIj, CDG2J, COG4-CDG, carbohydrate deficient glycoprotein syndrome type IIj, congenital disorder of glycosylation type 2j, congenital disorder of glycosylation type IIj.