Short answer · Medically reviewed summary · Last updated: 2026-05-08
Hurler Syndrome (MPS1H) is an ultra-rare, severe lysosomal storage disorder with an estimated global incidence of approximately 1 in 100,000 live births. While exact prevalence is difficult to track due to the severity of the disease and potential for underdiagnosis, it is considered one of the most serious forms of Mucopolysaccharidosis Type I. What is the estimated incidence and prevalence of Hurler Syndrome? The incidence of Hurler Syndrome (MPS1H) varies significantly by region, but it is generally estimated at 1 in 100,000 live births globally.
What is the prevalence of Hurler Syndrome MPS1H?
Prevalence of Hurler Syndrome MPS1H: how many people are affected worldwide, differences by sex and region, with sources.
Hurler Syndrome (MPS1H) is an ultra-rare, severe lysosomal storage disorder with an estimated global incidence of approximately 1 in 100,000 live births. While exact prevalence is difficult to track due to the severity of the disease and potential for underdiagnosis, it is considered one of the most serious forms of Mucopolysaccharidosis Type I.
What is the estimated incidence and prevalence of Hurler Syndrome?
The incidence of Hurler Syndrome (MPS1H) varies significantly by region, but it is generally estimated at 1 in 100,000 live births globally. Because Hurler Syndrome (MPS1H) is a progressive, life-limiting condition, its prevalence—the total number of people living with the disease at any one time—is lower than its incidence. It is classified as an ultra-rare disease.
Is there a difference in prevalence based on gender or geography?
Hurler Syndrome (MPS1H) is an autosomal recessive condition, meaning it affects males and females with equal frequency. There is no known geographic or ethnic predilection, though founder effects can lead to higher-than-average incidence rates in specific populations or isolated communities where consanguinity may be present.
What are the primary challenges in gathering accurate data?
Tracking the true prevalence of Hurler Syndrome (MPS1H) is challenging for several reasons:
- Underdiagnosis: Symptoms can be non-specific in early infancy, leading to diagnostic delays.
- Misdiagnosis: Early signs may be mistaken for more common pediatric conditions, such as recurrent ear infections or skeletal abnormalities.
- Variable Phenotypes: MPS1 exists on a spectrum (Hurler, Hurler-Scheie, and Scheie), and Hurler Syndrome (MPS1H) represents the most severe end, which may be under-reported in regions without newborn screening programs.
How does real-world experience complement clinical data?
While clinical literature provides the statistical framework, our DiseaseMaps.org community offers a vital patient perspective. Currently, 7 individuals with Hurler Syndrome (MPS1H) have joined our platform, providing real-world insights into the journey from diagnosis to treatment management that official statistics often overlook.
Next steps
- Consult with a metabolic geneticist to discuss diagnostic testing and family screening.
- Connect with the DiseaseMaps.org community to share experiences with others navigating Hurler Syndrome (MPS1H).
- Reach out to organizations like the National MPS Society for resources on clinical trials and specialized care centers.
Medical disclaimer: This information is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment.
References
- Orphanet: Mucopolysaccharidosis type 1 (ORPHA577)
- NIH Genetic and Rare Diseases Information Center (GARD): Hurler syndrome
- OMIM (Online Mendelian Inheritance in Man): Mucopolysaccharidosis Type IH
- National MPS Society: MPS I Disease Information
