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[Prader-Willi syndrome in a young infant]
W W Hack1, R ten Houten, E J Breslau-Suderius
1Medisch Centrum Alkmaar, Afd. Kindergeneeskunde.
Insights
Early diagnosis of Prader-Willi syndrome in infants with hypotonia is crucial. Genetic testing for chromosome 15 abnormalities can confirm the condition, enabling timely intervention and avoiding unnecessary procedures.
Area of Science:
- Genetics
- Pediatrics
- Neurology
Background:
- Prader-Willi syndrome (PWS) is a complex genetic disorder affecting multiple body systems.
- Infants with PWS often present with hypotonia (low muscle tone) and feeding difficulties, necessitating tube feeding.
- Characteristic facial features, though subtle, may include a narrow forehead and thin triangular upper lip.
Observation:
- Four infants, including twins, exhibited hypotonia and required tube feeding from birth.
- Initial examinations for neurological and muscular disorders did not yield a diagnosis.
- Subtle dysmorphic features were noted but not initially diagnostic.
Findings:
- Suspecting Prader-Willi syndrome led to targeted genetic testing.
- Confirmation of PWS was achieved by identifying an abnormality on chromosome 15.
- This genetic finding was key to establishing the diagnosis.
Implications:
- Early diagnosis of Prader-Willi syndrome is vital for prompt management.
- Genetic confirmation can prevent extensive and invasive diagnostic procedures.
- Timely intervention can improve outcomes for affected children.
Abstract:
Four children aged 2.5 years, 15.7 and 7 months, including a pair of twins, after birth displayed hypotonia which necessitated tube feeding. Other features were a narrow forehead and a thin triangular upper lip, but these abnormalities were not conspicuous. An extensive supplementary examination for cerebral and muscular disorders initially failed to produce a diagnosis. It was only when the Prader-Willi syndrome was suspected and a corresponding abnormality on chromosome 15 was looked for that this diagnosis could be made. Early diagnosis of this syndrome will avoid further invasive diagnostic procedures and make early treatment possible.