Phenotypic differerencss in African Americans with Prader-Willi syndrome.

Area of Science:

• Genetics and rare diseases
• Pediatric endocrinology
• Clinical dysmorphology

Background:

• Prader-Willi syndrome (PWS) is a complex genetic disorder.
• The typical PWS phenotype is well-documented in Caucasian populations.
• Underdiagnosis may occur in underrepresented ethnic groups due to phenotypic variations.

Purpose of the Study:

• To describe the clinical features of PWS in a cohort of African Americans.
• To highlight phenotypic differences compared to white patients with PWS.
• To improve diagnostic recognition of PWS in African American individuals.

Main Methods:

• Case series reporting on 10 African American patients with PWS.
• Clinical assessment focusing on growth parameters, anthropometry (hand and foot length), and facial features.
• Comparison of observed features with established PWS diagnostic criteria and literature on Caucasian cohorts.

Main Results:

• African American patients exhibited less severe growth impairment compared to white patients.
• Normal hand and foot lengths were common in this cohort.
• Atypical facial features were noted, potentially differing from classic descriptions.
• These variations may contribute to diagnostic challenges.

Conclusions:

• Phenotypic presentation of PWS can vary significantly across different ethnic groups.
• Clinicians should be aware of these specific differences in African Americans to ensure accurate diagnosis.
• Early and accurate diagnosis is essential for timely intervention and management of PWS.