Congenital disorder of glycosylation with defective fucosylation (CDGF) is a rare inherited metabolic disorder due to abnormalities in fucosylation, which is an enzymatic process of incorporating L-fucose into the N- and O-glycans of proteins or glycolipids. Fucosylation requires both the generation of the donor substrate GDP-fucose and the presence of a set of fucosyltransferases.
