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Congenital hypothyroidism with Prader-Willi syndrome
Carron Sher1, Tzvi Bistritzer, Gad Reisler
1Genetic Institute, Assaf-Harofeh Medical Center Zrifin, Israel. carrons@asaf.health.gov.il
Journal of Pediatric Endocrinology & Metabolism : JPEM
|February 2, 2002
Summary
Congenital hypothyroidism and Prader-Willi syndrome (PWS) can co-occur in infants with severe hypotonia. Further investigation is crucial for patients with congenital hypothyroidism who show inadequate treatment response.
Area of Science:
- Pediatric Endocrinology
- Clinical Genetics
- Developmental Pediatrics
Background:
- Congenital hypothyroidism is a common endocrine disorder in newborns.
- Prader-Willi syndrome (PWS) is a complex genetic disorder affecting multiple systems.
- Severe hypotonia in infants necessitates comprehensive diagnostic workup.
Observation:
- A 1-year-old female presented with severe hypotonia and congenital hypothyroidism due to an ectopic sublingual thyroid gland.
- The patient received thyroid replacement therapy but continued to exhibit significant motor delay.
- Genetic analysis, including DNA and fluorescence in situ hybridization (FISH), confirmed the presence of PWS.
Findings:
- This case highlights the co-occurrence of congenital hypothyroidism and Prader-Willi syndrome in a patient with severe hypotonia.
- The diagnostic pathway involved identifying a treatable endocrine condition followed by genetic confirmation of a complex syndrome.
- Inadequate response to thyroid hormone replacement prompted further investigation, leading to the PWS diagnosis.
Implications:
- Emphasizes the importance of thorough diagnostic evaluation in infants with congenital hypothyroidism who do not achieve expected developmental milestones.
- Suggests considering genetic testing for conditions like PWS in cases of unexplained severe hypotonia and motor delay, even with identified endocrine abnormalities.
- Underscores the need for multidisciplinary management in patients with co-existing congenital hypothyroidism and PWS to address both endocrine and developmental challenges.