National Center for Advancing and Translational Sciences Genetic and Rare Diseases Information Center, a program of the National Center for Advancing and Translational Sciences

ALG12-CDG (CDG-Ig)


Other Names:
CDG 1G; CDG1G; ALG12-CDG (CDG-Ig); CDG 1G; CDG1G; ALG12-CDG (CDG-Ig); ALG12-congenital disorder of glycosylation; Congenital disorder of glycosylation, type Ig ; CDG syndrome type Ig; CDG-Ig; Carbohydrate deficient glycoprotein syndrome type Ig; Congenital disorder of glycosylation type 1g; Mannosyltransferase 8 deficiency; ALG12-CDG; Congenital disorder of glycosylation type Ig See More
Categories:
This disease is grouped under:
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs.
orphanet

Orpha Number: 79324

Definition
A form of congenital disorders of N-linked glycosylation characterized by facial dysmorphism (prominent forehead, large ears, thin upper lip), generalized hypotonia, feeding difficulties, moderate to severe developmental delay, progressive microcephaly, frequent upper respiratory tract infections due to impaired immunity with decreased immunoglobulin levels, and decreased coagulation factors. Additional features include hypogonadism with or without hypospadias in males, skeletal anomalies, seizures and cardiac anomalies in some cases. The disease is caused by loss of function mutations of the gene ALG12 (22q13.33).

Visit the Orphanet disease page for more resources.
Last updated: 7/1/2016

This table lists symptoms that people with this disease may have. For most diseases, symptoms will vary from person to person. People with the same disease may not have all the symptoms listed. This information comes from a database called the Human Phenotype Ontology (HPO) . The HPO collects information on symptoms that have been described in medical resources. The HPO is updated regularly. Use the HPO ID to access more in-depth information about a symptom.

Showing of 43 |
Medical Terms Other Names
Learn More:
HPO ID
80%-99% of people have these symptoms
Cognitive impairment
Abnormality of cognition
Cognitive abnormality
Cognitive defects
Cognitive deficits
Intellectual impairment
Mental impairment
[ more ] 		0100543
Muscular hypotonia
Low or weak muscle tone
0001252
30%-79% of people have these symptoms
Abnormality of immune system physiology 0010978
Abnormality of the genital system
Genital abnormalities
Genital abnormality
Genital anomalies
Genital defects
[ more ] 		0000078
Percent of people who have these symptoms is not available through HPO
Abnormal facial shape
Unusual facial appearance
0001999
Abnormality of the pinna
Abnormally shaped ears
Auricular malformation
Deformed ears
Malformed ears
[ more ] 		0000377
Autosomal recessive inheritance 0000007
Butterfly vertebrae 0003316
Cryptorchidism
Undescended testes
Undescended testis
[ more ] 		0000028
Decreased circulating antibody level 0004313
Edema
Fluid retention
Water retention
[ more ] 		0000969
Failure to thrive
Faltering weight
Weight faltering
[ more ] 		0001508
Feeding difficulties
Feeding problems
Poor feeding
[ more ] 		0011968
Generalized hypotonia
Decreased muscle tone
Low muscle tone
[ more ] 		0001290
Global developmental delay 0001263
Hypocalcemia
Low blood calcium levels
0002901
Hypoplasia of the radius
Underdeveloped outer large forearm bone
0002984
Hypospadias 0000047
Inverted nipples 0003186
Micropenis
Short penis
Small penis
[ more ] 		0000054
Midface retrusion
Decreased size of midface
Midface deficiency
Underdevelopment of midface
[ more ] 		0011800
Patent ductus arteriosus 0001643
Patent foramen ovale 0001655
Polyhydramnios
High levels of amniotic fluid
0001561
Progressive microcephaly
Progressively abnormally small cranium
Progressively abnormally small skull
[ more ] 		0000253
Prolonged partial thromboplastin time 0003645
Psychomotor retardation 0025356
Recurrent respiratory infections
Frequent respiratory infections
Multiple respiratory infections
respiratory infections, recurrent
Susceptibility to respiratory infections
[ more ] 		0002205
Respiratory tract infection
Respiratory infection
0011947
Retinal detachment
Detached retina
0000541
Rhizomelia
Disproportionately short upper portion of limb
0008905
Sandal gap
Gap between 1st and 2nd toes
Gap between first and second toe
Increased space between first and second toes
Sandal gap between first and second toes
Wide space between 1st, 2nd toes
Wide space between first and second toes
Wide-spaced big toe
Widely spaced 1st-2nd toes
Widely spaced first and second toes
Widened gap 1st-2nd toes
Widened gap first and second toe
[ more ] 		0001852
Scrotal hypoplasia
Smaller than typical growth of scrotum
0000046
Sensorineural hearing impairment 0000407
Short femur
Short thighbone
0003097
Short humerus
Short long bone of upper arm
Short upper arms
[ more ] 		0005792
Short philtrum 0000322
Short ribs 0000773
Short tibia
Short shinbone
Short skankbone
[ more ] 		0005736
Small for gestational age
Birth weight less than 10th percentile
Low birth weight
[ more ] 		0001518
Talipes equinovarus
Club feet
Club foot
Clubfeet
Clubfoot
[ more ] 		0001762
Thin upper lip vermilion
Thin upper lip
0000219
Wide nose
Broad nose
Increased breadth of nose
Increased nasal breadth
Increased nasal width
Increased width of nose
[ more ] 		0000445
Showing of 43 |
Last updated: 7/1/2020

Making a diagnosis for a genetic or rare disease can often be challenging. Healthcare professionals typically look at a person’s medical history, symptoms, physical exam, and laboratory test results in order to make a diagnosis. The following resources provide information relating to diagnosis and testing for this condition. If you have questions about getting a diagnosis, you should contact a healthcare professional.

Testing Resources

  • The Genetic Testing Registry (GTR) provides information about the genetic tests for this condition. The intended audience for the GTR is health care providers and researchers. Patients and consumers with specific questions about a genetic test should contact a health care provider or a genetics professional.

If you need medical advice, you can look for doctors or other healthcare professionals who have experience with this disease. You may find these specialists through advocacy organizations, clinical trials, or articles published in medical journals. You may also want to contact a university or tertiary medical center in your area, because these centers tend to see more complex cases and have the latest technology and treatments.

If you can’t find a specialist in your local area, try contacting national or international specialists. They may be able to refer you to someone they know through conferences or research efforts. Some specialists may be willing to consult with you or your local doctors over the phone or by email if you can't travel to them for care.

You can find more tips in our guide, How to Find a Disease Specialist. We also encourage you to explore the rest of this page to find resources that can help you find specialists.

Healthcare Resources

Support and advocacy groups can help you connect with other patients and families, and they can provide valuable services. Many develop patient-centered information and are the driving force behind research for better treatments and possible cures. They can direct you to research, resources, and services. Many organizations also have experts who serve as medical advisors or provide lists of doctors/clinics. Visit the group’s website or contact them to learn about the services they offer. Inclusion on this list is not an endorsement by GARD.

Organizations Supporting this Disease

Social Networking Websites

  • RareConnect has an online community for patients and families with this condition so they can connect with others and share their experiences living with a rare disease. The project is a joint collaboration between EURORDIS (European Rare Disease Organisation) and NORD (National Organization for Rare Disorders).

These resources provide more information about this condition or associated symptoms. The in-depth resources contain medical and scientific language that may be hard to understand. You may want to review these resources with a medical professional.

Where to Start

In-Depth Information

  • The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
  • Online Mendelian Inheritance in Man (OMIM) is a catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine. 
  • Orphanet is a European reference portal for information on rare diseases and orphan drugs. Access to this database is free of charge.
  • PubMed is a searchable database of medical literature and lists journal articles that discuss ALG12-CDG (CDG-Ig). Click on the link to view a sample search on this topic.

Questions sent to GARD may be posted here if the information could be helpful to others. We remove all identifying information when posting a question to protect your privacy. If you do not want your question posted, please let us know.