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Transient progeroid phenotype and lipodystrophy in mosaic polyploidy
Judit Kárteszi1, György Kosztolányi, Marta Czakó
1University of Pécs, Medical Faculty, Department of Medical Genetics and Child Development, Pécs, Hungary University of Pécs, MTA-PTE Clinical Genetics Research Group, Pécs, Hungary University of Nijmegen, Department of Pediatrics, Nijmegen.
Clinical Dysmorphology
|December 1, 2005
Summary
Wiedemann-Rautenstrauch syndrome, a rare disorder, was identified in an infant with mosaic triploidy/tetraploidy. This chromosomal abnormality explains the syndrome
Area of Science:
- Genetics
- Pediatrics
- Rare Diseases
Background:
- Wiedemann-Rautenstrauch syndrome (WRS) is a rare, severe genetic disorder characterized by progeroid features, growth retardation, and early lethality.
- Typical clinical manifestations include a progeroid face, wrinkled skin, hypotonia, relative macrocephaly, arachnodactyly, and congenital heart defects.
Observation:
- A female infant presented with classic Wiedemann-Rautenstrauch syndrome features at birth.
- Initial chromosomal studies of peripheral leukocytes revealed a normal karyotype.
- Metabolic studies for congenital disorders of glycosylation were normal, despite abnormal lipid distribution and lipodystrophy.
Findings:
- Mosaic triploidy (60%) and tetraploidy (14%) were detected in the patient's fibroblast culture.
- These chromosomal findings suggest a link between mosaic polyploidy and Wiedemann-Rautenstrauch syndrome.
- The patient showed significant psychomotor development improvement and resolution of progeroid signs by 2.5 years of age.
Implications:
- Chromosome analysis of fibroblasts is recommended for neonates with progeroid features and lipodystrophy.
- This case highlights the importance of considering chromosomal abnormalities beyond initial karyotype analysis in rare genetic disorders.
- The findings expand the understanding of Wiedemann-Rautenstrauch syndrome's genetic basis and potential for improved outcomes.