U.S. flag

An official website of the United States government

GTR Home > Conditions/Phenotypes > Mucopolysaccharidosis, MPS-II

Mucopolysaccharidosis, MPS-II

Synonyms
Attenuated MPS (subtype; formerly known as mild MPS II); Hunter Syndrome; I2S deficiency; IDS deficiency; Iduronate 2-sulfatase deficiency; MPS 2; Mucopolysaccharidosis type 2; Mucopolysaccharidosis type II; Mucopolysaccharidosis with skin involvement; SIDS deficiency; Severe MPS II; Sulfoiduronate sulfatase deficiency
Modes of inheritance
X-linked recessive inheritance (Orphanet)

Summary

Excerpted from the GeneReview: Mucopolysaccharidosis Type II
Mucopolysaccharidosis type II (MPS II; also known as Hunter syndrome) is an X-linked multisystem disorder characterized by glycosaminoglycan (GAG) accumulation. The vast majority of affected individuals are male; on rare occasion heterozygous females manifest findings. Age of onset, disease severity, and rate of progression vary significantly among affected males. In those with early progressive disease, CNS involvement (manifest primarily by progressive cognitive deterioration), progressive airway disease, and cardiac disease usually result in death in the first or second decade of life. In those with slowly progressive disease, the CNS is not (or is minimally) affected, although the effect of GAG accumulation on other organ systems may be early progressive to the same degree as in those who have progressive cognitive decline. Survival into the early adult years with normal intelligence is common in the slowly progressing form of the disease. Additional findings in both forms of MPS II include: short stature; macrocephaly with or without communicating hydrocephalus; macroglossia; hoarse voice; conductive and sensorineural hearing loss; hepatosplenomegaly; dysostosis multiplex; spinal stenosis; and carpal tunnel syndrome.
Full text of GeneReview (by section):
Summary
Diagnosis
Clinical Characteristics
Genetically Related (Allelic) Disorders
Differential Diagnosis
Management
Genetic Counseling
Resources
Molecular Genetics
Chapter Notes
References
Authors:
Maurizio Scarpa
view full author information

Available tests

110 tests are in the database for this condition.

Check Related conditions for additional relevant tests.

Clinical tests (109 available)

Biochemical Genetics Tests

Molecular Genetics Tests

Genes See tests for all associated and related genes

  • Also known as: ID2S, MPS2, SIDS, IDS
    Summary: iduronate 2-sulfatase

Clinical features

Help
Imported from Human Phenotype Ontology (HPO)

Show allHide all

Reviews

Clinical resources

Practice guidelines

  • ACMG ACT, 2022
    American College of Medical Genetics and Genomics, Newborn Screening ACT Sheet, Iduronate 2-Sulfatase Deficiency, Mucopolysaccharidosis Type II, 2022
  • ACMG Algorithm, 2022
    American College of Medical Genetics and Genomics, Algorithm, Mucopolysacchardosis Type II (MPSII): Decreased Iduronate 2-Sulfatase (I2S) activity, 2022
  • EuroGenetest, 2011
    Clinical utility gene card for: mucopolysaccharidosis type II.

Molecular resources

Consumer resources

IMPORTANT NOTE: NIH does not independently verify information submitted to the GTR; it relies on submitters to provide information that is accurate and not misleading. NIH makes no endorsements of tests or laboratories listed in the GTR. GTR is not a substitute for medical advice. Patients and consumers with specific questions about a genetic test should contact a health care provider or a genetics professional.