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[Thyroid ectopia, a cause of error in neonatal screening for hypothyroidism]
Archives Francaises De Pediatrie
|May 1, 1983
Summary
Neonatal screening for hypothyroidism can miss cases of ectopic thyroid. Early diagnosis is crucial for timely treatment of thyroid hormone deficiencies in children.
Area of Science:
- Pediatric Endocrinology
- Neonatal Screening
- Thyroid Disorders
Background:
- Congenital hypothyroidism (CH) is a common endocrine disorder in newborns.
- Neonatal screening programs aim for early detection and treatment to prevent developmental delays.
- Ectopic thyroid tissue can lead to variable thyroid hormone levels.
Observation:
- A 3-year-old boy presented with hypothyroidism.
- His neonatal screening for hypothyroidism (thyroxine and thyroid-stimulating hormone) was normal.
- The patient had a large ectopic thyroid gland.
Findings:
- The case highlights that normal neonatal screening results do not always exclude congenital hypothyroidism.
- Ectopic thyroid tissue, particularly when large, may initially compensate, leading to false-negative screening results.
- Delayed diagnosis of hypothyroidism can occur despite routine newborn screening.
Implications:
- Emphasizes the need for vigilance in diagnosing hypothyroidism, even with normal neonatal screening.
- Suggests considering ectopic thyroid as a cause of delayed-onset or initially undetected hypothyroidism.
- Highlights the importance of follow-up and further investigation if clinical suspicion of thyroid dysfunction arises.