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[Trisomy 5p: a report of 2 cases]
Anales Espanoles De Pediatria
|March 31, 1985
Summary
Two patients with "almost complete" trisomy 5p (dup 5p) exhibited similar abnormalities. This genetic condition, trisomy of chromosome 5 short arm, presents distinct clinical features in affected individuals.
Area of Science:
- Genetics
- Clinical Genetics
- Human Genetics
Background:
- Trisomy 5p, a partial duplication of the short arm of chromosome 5, is a rare chromosomal abnormality.
- This condition can arise from balanced translocations in parents or as a de novo event.
Observation:
- Two unrelated patients presented with overlapping phenotypes associated with "almost complete" trisomy 5p.
- Case 1 involved a maternal balanced translocation (t(5;20)(p11;p13)), while Case 2 exhibited a de novo duplication (dup 5p).
Findings:
- Common features observed include hypotonia, weak cry, mongoloid slant of eyes, epicanthus, depressed nasal bridge, auricular anomalies, and bilateral cryptorchidism.
- Less frequent manifestations noted were macrocephaly, micrognathia, and club feet.
Implications:
- Characterizing trisomy 5p aids in understanding genotype-phenotype correlations for chromosome 5 abnormalities.
- Accurate diagnosis and genetic counseling are crucial for families affected by trisomy 5p.
- Further research can refine the understanding of critical regions on 5p responsible for specific phenotypic features.