Clinical Report: Deletion of 1q25.3–q32.1 Associated with Multisystem Developmental Delays
Overview
This report details a pediatric case of a 1q25.3–q32.1 deletion, highlighting significant developmental delays and associated clinical features. A literature review of 31 cases provides insights into genotype-phenotype correlations.
Background
Chromosomal abnormalities involving the long arm of chromosome 1, particularly deletions in the 1q25–q32 region, are rare but can lead to severe multisystem developmental issues. Understanding these deletions is crucial for early diagnosis and intervention, as they can significantly impact a child's growth and development.
Data Highlights
Clinical Feature
Observation
Birth Weight
2.0 kg (< -2 SD)
Head Circumference
30 cm (< -2 SD)
Length
45 cm (< -1 SD)
Deleted Segment Size
27.0 Mb
Key Findings
A male newborn exhibited intrauterine growth restriction and dysmorphic features.
Karyotype analysis confirmed a deletion at 1q25.3–q32.1.
Common clinical features included microcephaly, feeding difficulties, and developmental delays.
Key genes in the deleted region, such as LHX4 and CENPL, are linked to observed phenotypes.
Follow-up indicated persistent growth and developmental delays.
Clinical Implications
Clinicians should consider chromosomal microarray analysis for children presenting with developmental delays and dysmorphic features. Early diagnosis can facilitate tailored interventions and improve long-term outcomes.
Conclusion
The deletion of 1q25.3–q32.1 is a significant genetic finding associated with various developmental challenges. Awareness and timely genetic testing are essential for effective management.
