What is a common presentation of Hurler syndrome?

What is a common presentation of Hurler syndrome?

• A. Joint contractures and hepatosplenomegaly
• B. Neurodegeneration and seizures
• C. Gait abnormalities and cherry-red macules
• D. Skin hyperkeratosis and scaling

Answer: (A)

Hurler syndrome, also known as mucopolysaccharidosis type I (MPS I), is a genetic disorder caused by the deficiency of the enzyme alpha-L-iduronidase, leading to the accumulation of glycosaminoglycans (GAGs) in various tissues. The common presentations of Hurler syndrome encompass several features, including joint stiffness due to contractures and the enlargement of organs, known as hepatosplenomegaly. Joint contractures occur as the accumulated GAGs affect joint tissues and connective structures, leading to a limited range of motion. Hepatosplenomegaly arises from the storage of GAGs in liver and spleen tissues, causing these organs to enlarge significantly over time. This combination of joint issues and enlarged organs is a hallmark of the syndrome, helping distinguish it from other lysosomal storage disorders or conditions. Each clinical manifestation is a direct result of the metabolic disturbances caused by the enzyme deficiency and subsequent GAG accumulation. Understanding these features aids in early recognition and management of the disorder.

Hurler syndrome, also known as mucopolysaccharidosis type I (MPS I), is a genetic disorder caused by the deficiency of the enzyme alpha-L-iduronidase, leading to the accumulation of glycosaminoglycans (GAGs) in various tissues. The common presentations of Hurler syndrome encompass several features, including joint stiffness due to contractures and the enlargement of organs, known as hepatosplenomegaly.

Joint contractures occur as the accumulated GAGs affect joint tissues and connective structures, leading to a limited range of motion. Hepatosplenomegaly arises from the storage of GAGs in liver and spleen tissues, causing these organs to enlarge significantly over time.

This combination of joint issues and enlarged organs is a hallmark of the syndrome, helping distinguish it from other lysosomal storage disorders or conditions. Each clinical manifestation is a direct result of the metabolic disturbances caused by the enzyme deficiency and subsequent GAG accumulation. Understanding these features aids in early recognition and management of the disorder.