RFT1-congenital disorder of glycosylation (CDG) syndrome, a recessive N-glycosylation disorder caused by mutation in the RFT1 gene, is a very rare subtype of CDG syndrome associated with deafness, developmental delay, and non-specific epilepsy.
We report on two young adult siblings with RFT1-CDG, compound heterozygotes for the novel missense mutations c.1222A>G (p.M408V) and c.1325G>A (p.R442Q) in RFT1 gene.