22q11.2 duplications: Expanding the clinical presentation

Area of Science:

• Genetics
• Pediatrics
• Clinical Medicine

Background:

• 22q11.2 duplication syndrome is observed in approximately 1 in 700 individuals with intellectual disability.
• The clinical presentation and incidence of congenital anomalies are not well-characterized for 22q11.2 duplication syndrome.
• Existing knowledge primarily focuses on the 22q11.2 deletion syndrome, leaving a gap in understanding the duplication counterpart.

Purpose of the Study:

• To retrospectively review patients diagnosed with 22q11.2 duplication syndrome.
• To categorize the variable phenotype and document the incidence of congenital anomalies.
• To provide a clearer understanding of the health risks associated with 22q11.2 duplication syndrome.

Main Methods:

• Single-center, retrospective chart review.
• Analysis of patient data for diagnosed 22q11.2 duplication syndrome.
• Phenotypic categorization and assessment of congenital anomaly incidence.

Main Results:

• The study suggests a potentially higher incidence of congenital anomalies in 22q11.2 duplication syndrome than previously reported.
• Individuals are at increased risk for gastrointestinal, endocrine, ophthalmologic, palatal, cardiac, musculoskeletal, and neurological issues.
• The variable clinical presentation necessitates comprehensive evaluation and management.

Conclusions:

• 22q11.2 duplication syndrome is associated with a broad spectrum of health problems.
• Early identification and management by a multidisciplinary team are crucial.
• Management strategies similar to those for 22q11.2 deletion syndrome may be beneficial.