Related Experiment Videos
Polydactyly in a boy with Smith-Magenis syndrome
Lisbeth MarianneJensen1, Maria Kirchhoff
1Pediatric Department, Herning Sygehus, Herning, Denmark Rigshospitalet, Department of Clinical Genetics, Copenhagen, Denmark.
Clinical Dysmorphology
|September 13, 2005
Summary
Smith-Magenis syndrome, a chromosome 17p11.2 microdeletion, typically presents with intellectual disability and behavioral issues. This report details a novel case exhibiting polydactyly, a previously undescribed feature in Smith-Magenis syndrome.
Area of Science:
- Genetics
- Developmental Biology
- Clinical Medicine
Background:
- Smith-Magenis syndrome (SMS) is a genetic disorder caused by a deletion on chromosome 17p11.2.
- Key features include intellectual disability, distinct facial morphology, skeletal anomalies (e.g., brachydactyly), and behavioral disturbances like sleep pattern disruption and self-harm.
Observation:
- This study reports on a patient diagnosed with Smith-Magenis syndrome.
- A notable and previously undocumented observation in this patient is the presence of polydactyly, specifically six digits on each hand.
Findings:
- The presence of polydactyly in this Smith-Magenis syndrome patient represents a new phenotypic characteristic for the condition.
- This finding expands the known spectrum of skeletal anomalies associated with the 17p11.2 deletion syndrome.
Implications:
- This case highlights the importance of thorough phenotypic assessment in genetic syndromes.
- Further research may elucidate the genetic mechanisms linking the 17p11.2 deletion to polydactyly, potentially refining diagnostic criteria and understanding of SMS.
- This expands the clinical presentation of Smith-Magenis syndrome.