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Congenital hypothyroidism with hereditary, raised thyroxine binding globulin
Archives of Disease in Childhood
|August 1, 1985
Summary
A rare combination of congenital hypothyroidism and hereditary raised thyroxine binding globulin led to under-treatment in a boy. This resulted in delayed bone maturation and growth until thyroid stimulating hormone testing became standard.
Area of Science:
- Pediatric Endocrinology
- Clinical Genetics
- Thyroid Disorders
Background:
- Congenital hypothyroidism (CH) requires lifelong thyroid hormone replacement therapy.
- Hereditary thyroxine binding globulin (TBG) deficiency can affect thyroid hormone level interpretation.
- The interplay between CH and hereditary TBG abnormalities is rarely reported.
Observation:
- A case study of a boy with both CH and hereditary elevated TBG is presented.
- The patient was initially undertreated for his thyroid deficiency.
- Serum thyroid stimulating hormone (TSH) measurement was crucial for accurate diagnosis and management.
Findings:
- The combination of CH and hereditary elevated TBG led to delayed diagnosis and inadequate L-thyroxine treatment.
- Inadequate treatment between ages 2 and 7 years resulted in retarded bone maturation and poor growth velocity.
- Educational difficulties may have been exacerbated by the prolonged thyroid hormone deficiency.
Implications:
- Highlights the importance of TSH in diagnosing and managing thyroid disorders, especially in complex cases.
- Underscores the need for careful monitoring and appropriate L-thyroxine dosing in children with CH and genetic variations affecting thyroid hormone transport.
- Suggests a potential link between early-life thyroid deficiency and later educational outcomes.