Infantile refsum disease in four Amish sibs

Area of Science:

• Biochemistry
• Genetics
• Pediatrics

Background:

• Infantile Refsum disease (IRD) is a rare, inherited metabolic disorder.
• It is characterized by a spectrum of neurological and physical impairments.

Observation:

• A report on four Amish siblings from a consanguineous union diagnosed with IRD.
• Affected individuals presented with impaired vision, hearing loss, developmental delays, and neuromotor deficits.

Findings:

• Biochemical testing confirmed the diagnosis of IRD in the affected siblings.
• Distinctive yellow-orange, poorly formed teeth were observed in at least three siblings.
• Behavioral issues were noted in the affected females.

Implications:

• Highlights the phenotypic variability of IRD, including dental anomalies.
• Suggests potential genotype-phenotype correlations within the Amish population.
• Emphasizes the importance of comprehensive clinical evaluation for IRD diagnosis.