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Prader-Willi syndrome with chromosome 15 interstitial deletion: report of one case
1Department of Pediatrics, National Taiwan University Hospital, Taipei, R.O.C.
Insights
This study details a rare case of Prader-Willi syndrome in Taiwan, identified by a specific chromosome 15 deletion. This finding aids in diagnosing genetic disorders and understanding their causes.
Area of Science:
- Genetics
- Pediatrics
- Clinical Medicine
Background:
- Prader-Willi syndrome is a complex genetic disorder affecting multiple body systems.
- Early diagnosis and understanding of genetic aberrations are crucial for patient management.
Observation:
- A one-and-a-half-year-old boy presented with classic Prader-Willi syndrome features, including hypotonia, feeding difficulties, and developmental changes.
- Physical examination revealed bilateral cryptorchism and hypogonadism.
Findings:
- High-resolution chromosomal banding identified an interstitial deletion on chromosome 15 (bands 11-13 on the long arm).
- This specific chromosomal abnormality is a known factor in Prader-Willi syndrome etiology.
- This represents the first documented case of Prader-Willi syndrome with chromosomal changes in Taiwan.
Implications:
- The detection of small chromosomal lesions is vital for accurate diagnosis and understanding the genetic basis of diseases.
- This case highlights the importance of cytogenetic analysis in diagnosing rare genetic conditions.
- Further research into chromosomal aberrations can advance the study of hereditary diseases.
Abstract:
We report one classical case of Prader-Willi syndrome, and show the specific chromosome number 15 interstitial deletion. This one and half year old boy had the typical face of Prader-Willi syndrome and its characteristic histories of hypotonia, poor feeding, poor growth during early infancy, and then improved appetite and growth since the later half infancy. He also had bilateral cryptorchism and hypogonadism. With an aid of high resolution chromosomal banding technique, we found a small deletion including band 11 to 13 of the long arm of one of his chromosome number 15. This kind of chromosomal aberration is frequently found in Prader-Willi syndrome. This is the first case of Prader-Willi syndrome with chromosomal changes we found in Taiwan. Chromosomal changes may help both the diagnosis and the understanding of etiologies of many disease. We hope the ability to detect small chromosomal lesions will initiate our study to those hereditary diseases.