Clinical hints to diagnosis of attenuated forms of Mucopolysaccharidoses

Area of Science:

• Biochemistry
• Genetics
• Metabolic Disorders

Background:

• Mucopolysaccharidoses (MPS) encompass a group of rare genetic disorders.
• These conditions are characterized by the body's inability to break down glycosaminoglycans.
• Clinical presentations of MPS are heterogeneous, ranging from severe to attenuated forms.

Purpose of the Study:

• To describe the natural history of attenuated mucopolysaccharidoses.
• To identify key clinical signs indicative of attenuated MPS.
• To facilitate earlier diagnosis and treatment of attenuated MPS forms.

Main Methods:

• Review of natural history and clinical manifestations of attenuated MPS.
• Analysis of common signs and symptoms across affected organ systems.
• Proposal of a semistructured medical history form for patient evaluation.

Main Results:

• Attenuated MPS forms are often misdiagnosed or delayed due to milder presentations.
• Cognitive function is typically normal in attenuated MPS; facial dysmorphisms may be subtle or absent.
• Frequently affected systems include osteoarticular, cardiac, and ocular; hepatosplenomegaly, hearing loss, and respiratory issues are also common.

Conclusions:

• Early diagnosis of attenuated MPS is crucial for timely intervention and improved outcomes.
• A systematic approach, including a dedicated medical history form, can help specialists recognize subtle signs.
• Improved diagnostic strategies are needed to address the challenges posed by attenuated MPS presentations.