Mucopolysaccharidosis type I
Editor-In-Chief: Prab R Tumpati, MD
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Mucopolysaccharidosis type I | |
---|---|
Synonyms | Hurler syndrome, Scheie syndrome, Hurler-Scheie syndrome |
Pronounce | |
Specialty | Medical genetics |
Symptoms | Developmental delay, hepatosplenomegaly, corneal clouding, joint stiffness, hearing loss |
Complications | N/A |
Onset | Infancy or early childhood |
Duration | Lifelong |
Types | N/A |
Causes | Genetic mutation in the IDUA gene |
Risks | Family history |
Diagnosis | Enzyme assay, genetic testing |
Differential diagnosis | Other mucopolysaccharidoses, Hunter syndrome |
Prevention | None |
Treatment | Enzyme replacement therapy, hematopoietic stem cell transplantation |
Medication | Laronidase |
Prognosis | Variable, depends on severity |
Frequency | 1 in 100,000 births |
Deaths | Varies, often in childhood without treatment |
Mucopolysaccharidosis type I (MPS I) is a rare genetic disorder characterized by the body's inability to properly break down certain types of complex carbohydrates known as mucopolysaccharides. This condition is part of a larger group of metabolic disorders known as lysosomal storage diseases.
Symptoms[edit | edit source]
The symptoms of MPS I can vary widely in severity and onset. In severe cases, symptoms may appear in infancy and include growth retardation, hearing loss, heart disease, respiratory problems, and mental retardation. In milder cases, symptoms may not appear until later in childhood or even adulthood, and may include joint stiffness, carpal tunnel syndrome, and heart valve disease.
Causes[edit | edit source]
MPS I is caused by mutations in the IDUA gene, which provides instructions for producing an enzyme that helps break down mucopolysaccharides. When this enzyme is deficient or absent, mucopolysaccharides accumulate in the body's cells, causing the various symptoms of MPS I.
Diagnosis[edit | edit source]
Diagnosis of MPS I typically involves a combination of physical examination, medical history, and laboratory tests. These tests may include enzyme activity testing, genetic testing, and imaging studies.
Treatment[edit | edit source]
There is currently no cure for MPS I, but treatment options are available to help manage symptoms and improve quality of life. These may include enzyme replacement therapy, bone marrow transplant, and surgery to address specific symptoms.
See also[edit | edit source]
References[edit | edit source]
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Contributors: Prab R. Tumpati, MD