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Trisomy 9p due to paternal translocation, t(9;13) (q13;q12)
Humangenetik
|December 23, 1975
Summary
This case study details a 16-year-old female with trisomy 9p, presenting with developmental delays and distinct physical features. Genetic analysis revealed a balanced translocation in her family, linking to the observed condition.
Area of Science:
- Genetics
- Pediatrics
- Clinical Medicine
Background:
- Trisomy 9p is a rare chromosomal disorder.
- It is associated with intellectual disability and characteristic facial features.
- Family history can play a role in chromosomal abnormalities.
Observation:
- A 16-year-old female presented with short stature and severe mental retardation.
- Clinical findings included hypertelorism, downslanting palpebral fissures, convergent strabismus, a bulbous nose, short upper lip, narrow palate, short neck, kyphoscoliosis, and clubfoot.
- Skeletal abnormalities included phalangeal hypoplasia/dysplasia, delayed bone age, and unique dermatoglyphic patterns.
Findings:
- The patient exhibited a complex phenotype consistent with trisomy 9p.
- A balanced translocation t(9;13)(q13;q12) was identified in the patient's father and three other family members.
- This translocation is likely the underlying cause of the patient's trisomy 9p.
Implications:
- This case highlights the phenotypic variability of trisomy 9p.
- Understanding the genetic basis, such as translocations, is crucial for genetic counseling and family planning.
- Further research into trisomy 9p can improve diagnostic and management strategies.
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