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ALG12-CDG

Disease 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).

ORPHA:79324

Classification level: Disorder
  • Synonym(s):
    • CDG syndrome type Ig
    • CDG-Ig
    • CDG1G
    • Carbohydrate deficient glycoprotein syndrome type Ig
    • Congenital disorder of glycosylation type 1g
    • Congenital disorder of glycosylation type Ig
    • Mannosyltransferase 8 deficiency
  • Prevalence: <1 / 1 000 000
  • Inheritance: Autosomal recessive 
  • Age of onset: Infancy, Neonatal
  • ICD-10: E77.8
  • ICD-11: 5C54.0
  • OMIM: 607143
  • UMLS: C2931001
  • MeSH: C535745
  • GARD: 9833
  • MedDRA: -

  A summary on this disease is available in Español (2016) Italiano (2016) Nederlands (2016) Deutsch (2006) Français (2006)

Detailed information

Disease review articles

ERN produced/endorsed by ERN(s)   FSMR produced/endorsed by FSMR(s)

Additional information

Further information on this disease

Patient-centred resources for this disease

Research activities on this disease

Specialised Social Services

The documents contained in this web site are presented for information purposes only. The material is in no way intended to replace professional medical care by a qualified specialist and should not be used as a basis for diagnosis or treatment.