Congenital disorder of glycosylation
MONDO:0015286Congenital disorder of glycosylation (CDG) is a fast growing group of inborn errors of metabolism characterized by defective activity of enzymes that participate in glycosylation (modification of proteins and other macromolecules by adding and processing of oligosaccharide side chains). CDG is comprised of phenotypically diverse disorders affecting multiple systems including the central nervous system, muscle function, immunity, endocrine system, and coagulation. The numerous entities in this group are subdivided, based on the synthetic pathway affected, into disorder of protein N-glycosylation, disorder of protein O-glycosylation, disorder of multiple glycosylation, and disorder of glycosphingolipid and glycosylphosphatidylinositol anchor glycosylation.
Also known as: CDG, carbohydrate deficient glycoprotein syndrome, carbohydrate-deficient glycoprotein syndrome, congenital disorder of glycosylation, carbohydrate-deficient glycoprotein syndromes, congenital disorders of glycosylation
36 clinical trials for this condition and its sub-types, 7 tagged with Congenital disorder of glycosylation itself.
Follow this condition to get notified about new trialsWhere it sits in the disease tree
Browse by category →Sub-types of Congenital disorder of glycosylation
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Disorder of protein O-glycosylation 0 trials · 13 incl. sub-types
6 sub-types
- Myopathy caused by variation in FKRP 0 trials · 8 incl. sub-types Sub-types →
- Qualitative or quantitative defects of protein involved in O-glycosylation of alpha-dystroglycan 0 trials · 8 incl. sub-types Sub-types →
- Disorder of fucoglycosan synthesis 0 trials · 4 incl. sub-types Sub-types →
- Autosomal recessive limb-girdle muscular dystrophy type 2R1 1 trial
- Myopathy caused by variation in POMGNT1 0 trials · 1 incl. sub-types Sub-types →
- Myopathy caused by variation in POMGNT2 0 trials Sub-types →
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Disorder of multiple glycosylation 0 trials · 9 incl. sub-types
19 sub-types
- GNE myopathy 3 trials
- Leukocyte adhesion deficiency type II 2 trials
- Reunion island Larsen syndrome 1 trial
- SLC35A2-congenital disorder of glycosylation 1 trial
- Congenital dyserythropoietic anemia type 2 1 trial
- Immunodeficiency 23 1 trial
- B4GALT1-congenital disorder of glycosylation 0 trials
- CCDC115-CDG 0 trials
- DK1-congenital disorder of glycosylation 0 trials
- DPM3-congenital disorder of glycosylation 0 trials Sub-types →
- MPDU1-congenital disorder of glycosylation 0 trials
- SLC35A1-congenital disorder of glycosylation 0 trials
- SRD5A3-congenital disorder of glycosylation 0 trials
- TMEM199-CDG 0 trials
- Congenital disorder of glycosylation type 1E 0 trials
- Congenital muscular dystrophy with intellectual disability and severe epilepsy 0 trials
- Defect in V-ATPase 0 trials
- Defect in conserved oligomeric Golgi complex 0 trials Sub-types →
- Developmental and epileptic encephalopathy, 50 0 trials
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Congenital disorder of glycosylation type I 0 trials · 7 incl. sub-types
28 sub-types
- PMM2-congenital disorder of glycosylation 5 trials
- MPI-congenital disorder of glycosylation 1 trial
- PGM1-congenital disorder of glycosylation 1 trial
- ALG1-congenital disorder of glycosylation 0 trials
- ALG11-congenital disorder of glycosylation 0 trials
- ALG12-congenital disorder of glycosylation 0 trials
- ALG2-congenital disorder of glycosylation 0 trials Sub-types →
- ALG3-congenital disorder of glycosylation 0 trials
- ALG6-congenital disorder of glycosylation 1C 0 trials
- ALG8-congenital disorder of glycosylation 0 trials
- ALG9-congenital disorder of glycosylation 0 trials Sub-types →
- DDOST-congenital disorder of glycosylation 0 trials
- DK1-congenital disorder of glycosylation 0 trials
- DPAGT1-congenital disorder of glycosylation 0 trials
- DPM3-congenital disorder of glycosylation 0 trials Sub-types →
- MPDU1-congenital disorder of glycosylation 0 trials
- RFT1-congenital disorder of glycosylation 0 trials
- SRD5A3-congenital disorder of glycosylation 0 trials
- SSR3-CDG 0 trials
- SSR4-congenital disorder of glycosylation 0 trials
- STT3A-congenital disorder of glycosylation 0 trials
- STT3B-congenital disorder of glycosylation 0 trials
- Congenital disorder of glycosylation type 1E 0 trials
- Congenital disorder of glycosylation, type IAA 0 trials
- Congenital disorder of glycosylation, type ICC 0 trials
- Congenital muscular dystrophy with intellectual disability and severe epilepsy 0 trials
- Developmental and epileptic encephalopathy, 36 0 trials
- Developmental and epileptic encephalopathy, 50 0 trials
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Disorder of protein N-glycosylation 0 trials · 7 incl. sub-types
26 sub-types
- PMM2-congenital disorder of glycosylation 5 trials
- MPI-congenital disorder of glycosylation 1 trial
- PGM1-congenital disorder of glycosylation 1 trial
- ALG1-congenital disorder of glycosylation 0 trials
- ALG11-congenital disorder of glycosylation 0 trials
- ALG12-congenital disorder of glycosylation 0 trials
- ALG2-congenital disorder of glycosylation 0 trials Sub-types →
- ALG3-congenital disorder of glycosylation 0 trials
- ALG6-congenital disorder of glycosylation 1C 0 trials
- ALG8-congenital disorder of glycosylation 0 trials
- ALG9-congenital disorder of glycosylation 0 trials Sub-types →
- DDOST-congenital disorder of glycosylation 0 trials
- DPAGT1-congenital disorder of glycosylation 0 trials
- MAN1B1-congenital disorder of glycosylation 0 trials
- MGAT2-congenital disorder of glycosylation 0 trials
- MOGS-congenital disorder of glycosylation 0 trials
- RFT1-congenital disorder of glycosylation 0 trials
- SLC39A8-CDG 0 trials
- SSR4-congenital disorder of glycosylation 0 trials
- ST3GAL3-congenital disorder of glycosylation 0 trials Sub-types →
- STT3A-congenital disorder of glycosylation 0 trials
- STT3B-congenital disorder of glycosylation 0 trials
- TMEM165-congenital disorder of glycosylation 0 trials
- Autism spectrum disorder - epilepsy - arthrogryposis syndrome 0 trials
- Congenital disorder of glycosylation type 1EE with or without immunodeficiency 0 trials
- Developmental and epileptic encephalopathy, 36 0 trials
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Congenital disorder of glycosylation type II 0 trials · 3 incl. sub-types
26 sub-types
- Leukocyte adhesion deficiency type II 2 trials
- SLC35A2-congenital disorder of glycosylation 1 trial
- B4GALT1-congenital disorder of glycosylation 0 trials
- CCDC115-CDG 0 trials
- COG1-congenital disorder of glycosylation 0 trials
- COG4-congenital disorder of glycosylation 0 trials
- COG5-congenital disorder of glycosylation 0 trials
- COG6-congenital disorder of glycosylation 0 trials
- COG7-congenital disorder of glycosylation 0 trials
- COG8-congenital disorder of glycosylation 0 trials
- MGAT2-congenital disorder of glycosylation 0 trials
- MOGS-congenital disorder of glycosylation 0 trials
- SLC35A1-congenital disorder of glycosylation 0 trials
- SLC39A8-CDG 0 trials
- TMEM165-congenital disorder of glycosylation 0 trials
- TMEM199-CDG 0 trials
- Congenital disorder of glycosylation, type 2v 0 trials
- Congenital disorder of glycosylation, type IIaa 0 trials
- Congenital disorder of glycosylation, type IIbb 0 trials
- Congenital disorder of glycosylation, type IIcc 0 trials
- Congenital disorder of glycosylation, type IIq 0 trials
- Congenital disorder of glycosylation, type IIr 0 trials
- Congenital disorder of glycosylation, type IIw 0 trials
- Congenital disorder of glycosylation, type IIy 0 trials
- Congenital disorder of glycosylation, type IIz 0 trials
- Congenital disorder of glycosylation, type iit 0 trials
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3 sub-types
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2 sub-types
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Larsen-like syndrome, B3GAT3 type 0 trials
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8 sub-types
- CHIME syndrome 0 trials
- GM3 synthase deficiency 0 trials
- Hypercoagulability syndrome due to glycosylphosphatidylinositol deficiency 0 trials
- Hyperphosphatasia-intellectual disability syndrome 0 trials Sub-types →
- Intellectual disability, autosomal recessive 53 0 trials
- Multiple congenital anomalies-hypotonia-seizures syndrome 1 0 trials
- Multiple congenital anomalies-hypotonia-seizures syndrome 2 0 trials
- Multiple congenital anomalies-hypotonia-seizures syndrome 3 0 trials
Most studied deeper sub-types
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Could a daily sugar dose help kids with rare CDG?
Disease control CompletedThis study looked at whether taking simple sugars as a daily supplement can improve health in children with congenital disorders of glycosylation (CDG), a rare genetic condition. Twenty participants took the supplement while researchers tracked growth, blood sugar, liver function…
Sponsor: Mayo Clinic • Aim: Disease control
Last updated Jun 27, 2026 07:52 UTC
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New metabolomic test could spot rare metabolic diseases faster
Diagnosis CompletedThis study tested a new method called global metabolomic profiling to diagnose inborn errors of metabolism, a group of rare genetic disorders. Researchers compared this approach to traditional testing in 240 participants. The goal was to see if the new method could more accuratel…
Sponsor: Mayo Clinic • Aim: Diagnosis
Last updated Jun 27, 2026 07:53 UTC
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Tiny study probes why CDG patients have Stroke-Like events
Knowledge-focused CompletedThis study looked at how the cells lining blood vessels (endothelial cells) might be involved in stroke-like episodes in people with Congenital Disorders of Glycosylation (CDG). Researchers took blood samples from 6 CDG patients and grew their endothelial cells in the lab to test…
Sponsor: Assistance Publique - Hôpitaux de Paris • Aim: Knowledge-focused
Last updated Jun 27, 2026 12:04 UTC
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Rare disease clotting mystery probed in 57 patients
Knowledge-focused CompletedThis study examined blood clotting in 57 people with Congenital Disorder of Glycosylation (CDG), a rare genetic condition. Researchers used a special test called the thrombin generation assay to see if the body's clotting system stays balanced despite having low levels of both cl…
Sponsor: Assistance Publique - Hôpitaux de Paris • Aim: Knowledge-focused
Last updated Jun 27, 2026 09:10 UTC