Type 2 Gaucher disease: phenotypic variation and genotypic heterogeneity

Area of Science:

• Biochemistry
• Genetics
• Neurology

Background:

• Gaucher disease (GD) is the most prevalent lysosomal storage disease, caused by glucocerebrosidase deficiency.
• GD is classified into three types, with type 2 (acute neuronopathic form) being the most severe.
• Type 2 GD typically presents at birth or in early infancy.

Observation:

• Traditionally, type 2 GD was believed to have a uniform clinical presentation.
• Recent case studies reveal a broad spectrum of phenotypes in type 2 GD, similar to other GD types.
• Clinical variability exists despite association with severe mutations in the glucocerebrosidase gene.

Findings:

• This review synthesizes case reports illustrating the diverse clinical presentations of type 2 GD.
• It discusses associated manifestations, pathological findings, and diagnostic methods.
• Genotypic heterogeneity contributes to the varied phenotypes observed in type 2 GD.

Implications:

• Understanding the phenotypic spectrum of type 2 GD is crucial for accurate diagnosis and management.
• Recognizing the variability can improve patient care and therapeutic strategies.
• Further research into genotype-phenotype correlations may refine treatment approaches for Gaucher disease.