[Trisomy 10q24--10qter]

Area of Science:

• Genetics
• Clinical Dysmorphology
• Pediatric Medicine

Background:

• Trisomy 10q24 to 10qter is a chromosomal abnormality resulting in partial duplication of chromosome 10.
• This condition is associated with a recognizable pattern of congenital anomalies and developmental issues.

Observation:

• Patients exhibit a characteristic facial dysmorphia including a broad, round, flat face with epicanthal folds and a hypoplastic nasal bridge.
• Joint laxity leading to subluxations, severe growth retardation, and profound intellectual disability are consistently observed.
• A unique dermatoglyphic finding includes a gap between the first and second toes with a plantar crease.

Findings:

• The syndrome arises from various chromosomal rearrangements, with a breakpoint in 10q24 suggesting a fragile region.
• Clinical features are consistent across reported cases, aiding in syndrome recognition.
• The specific genetic imbalance dictates the phenotypic expression.

Implications:

• Accurate diagnosis of trisomy 10q24 to 10qter is crucial for genetic counseling and family planning.
• Understanding the chromosomal lability at 10q24 may offer insights into mechanisms of chromosomal instability.
• Further research can elucidate genotype-phenotype correlations for better patient management.