Expanding Genotype/Phenotype Correlation in 2p11.2-p12 Microdeletion Syndrome

Area of Science:

• Genetics
• Human Genetics
• Clinical Genetics

Background:

• Chromosomal abnormalities in the 2p11.2 region are linked to developmental disorders.
• Microdeletions on chromosome 2 can result in intellectual disability and physical malformations.

Observation:

• A patient presented with a de novo heterozygous 5 Mb microdeletion at 2p11.2-p12.
• Clinical features included facial dysmorphism, low-set ears, nystagmus, decreased visual acuity, and psychomotor delay.

Findings:

• Array comparative genomic hybridization (CGH) identified the microdeletion.
• Literature review revealed nine previously reported patients with similar 2p11.2p12 microdeletions.
• Common features include psychomotor delay, ear anomalies, intellectual disability, and facial malformations.

Implications:

• This research helps define a recognizable phenotype for the 2p11.2p12 microdeletion syndrome.
• Understanding genotype-phenotype correlations is crucial for diagnosing and managing this rare genetic condition.
• Further research can elucidate the specific genes contributing to the heterogeneous clinical presentation.