All forms of congenital hypothyroidism occur in 1 in 4,000 live births worldwide. The dysgenetic form affects twice as many females as males. It is the most prevalent congenital endocrine disease. The incidence is approximately 1 in 32,000 in Blacks and 1 in 2,000 in Hispanics.
Synonyms and Related Disorders
Ectopic thyroid gland; Thyroid agenesis; Thyroid dysgenesis; Thyroid hypoplasia; Thyrotropin resistance
Genetics/Basic Defects
- 1.
Inheritance (Ambrugger et al. 2001)
- a.
Thyroid dysgenesis
- i.
The most frequent cause of congenital hypothyroidism (85% of cases)
- ii.
Morphological classification
- a)
Ectopic thyroid gland: the most frequent malformation, observed most frequently at the base of the tongue
- b)
Athyreosis (absence of any detectable thyroid tissue)
- c)
Hypoplasia (partially absent thyroid)
- a)
- iii.
Sporadic in most cases
- iv.
Genetic factors contributing to the development of thyroid dysgenesis in 2% of cases with a positive familial history
...
- i.
- a.
References
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(2012). Congenital Hypothyroidism. In: Chen, H. (eds) Atlas of Genetic Diagnosis and Counseling. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-1037-9_54
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DOI: https://doi.org/10.1007/978-1-4614-1037-9_54
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