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Partial trisomy 1q with growth hormone deficiency and normal intelligence
E K Schorry1, K N Dietrich, H M Saal
1Division of Human Genetics, Children's Hospital Medical Center, Cincinnati, Ohio 45229, USA.
American Journal of Medical Genetics
|May 26, 1998
Summary
This study identifies a specific genetic condition, partial trisomy 1q, linked to a familial insertion. Affected individuals may exhibit growth issues and pituitary abnormalities but can have normal intelligence.
Area of Science:
- Genetics
- Human Genetics
- Chromosomal Abnormalities
Background:
- Familial chromosomal insertions can lead to unbalanced rearrangements in offspring.
- Understanding the phenotypic consequences of specific chromosomal imbalances is crucial for genetic counseling.
Observation:
- Two siblings presented with partial trisomy 1 (q31.1-q32.1) resulting from a familial insertion of chromosome 1q into 4p.
- Patient 1 exhibited minor anomalies, short stature, growth hormone deficiency, and ectopic pituitary, but normal psychomotor development and intelligence.
- Patient 2 presented with intrauterine growth retardation, sharing the same partial trisomy 1q.
Findings:
- Partial trisomy 1(q31.1-q32.1) is associated with prenatal and postnatal growth retardation.
- Observed features include narrow palpebral fissures, microphthalmia, and microstomia.
- Pituitary abnormalities and normal intelligence were noted in affected individuals.
Implications:
- Recognition of a distinct phenotype for trisomy 1(q31.1-q32.1) aids in diagnosis and management.
- This finding highlights the importance of detailed cytogenetic analysis in cases of developmental delay and growth abnormalities.
- Further research can elucidate the specific genes within the trisomic region responsible for the observed phenotype.