Get in touch with RARE Concierge.

Contact RARE Concierge

Synonyms: CDG syndrome type Iy | CDG-Iy | CDG1Y | Carbohydrate deficient glycoprotein syndrome type Iy | Congenital disorder of glycosylation type 1y | Congenital disorder of glycosylation type Iy

SSR4-CDG is a form of congenital disorders of N-linked glycosylation characterized by neurologic abnormalities (global developmental delay in language social skills and fine and gross motor development intellectual disability hypotonia microcephaly seizures/epilepsy) facial dysmorphism (deep set eyes large ears hypoplastic vermillion of upper lip large mouth with widely spaced teeth) feeding problems often due to chewing difficulties and aversion to food with certain textures failure to thrive gastrointestinal abnormalities (reflux or vomiting) and strabismus. The disease is caused by mutations in the gene SSR4 (Xq28).

Data from Orphanet are used to provide information on a disease's name, synonym(s), and overview. Reference: Access aggregated data from Orphanet at Orphadata. Orphadata: Free access data from Orphanet. © INSERM 1999. Available on Data version June 2024

Newly diagnosed with

Our RARE Concierge Services Guides are available to assist you by providing information, resources and connections as you navigate your rare disease journey.

Get Concierge Help

Advocacy Organizations


Our mission is to promote greater awareness and understanding of CDG & NGLY1-Deficiency, to provide information and support to families affected by CDG & NGLY1, and to advocate for and fund scientific research to advance the diagnosis and treatment of CDG & NGLY1-Deficiency.

Mississippi Metabolics Foundation

Our mission at Mississippi Metabolics Foundation (MMF) is to advocate, educate, and support families in MS affected by genetic metabolic disorders/inborn errors of metabolism (IEM's). MMF promotes initiatives and further advancements in legislation, education, research, clinical trials, studies, therapies, targeted treatments, and eventual cures for IEM’s and all rare diseases.

Don't see your organization here. Let us know here.

Clinical Trials

For a list of clinical trials in this disease area, please click here.