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Thyroid (Screening for disease (Congenital hypothyroidism = 1 in 4,000…
Thyroid
Screening for disease
Congenital hypothyroidism = 1 in 4,000 births
Untreated children become cretins (low intelligence, impaired growth, poor motor function)
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Screening involves measurement of TSH in a blood sample collected onto a Guthrie card (done at same time as screening for phenylketonuria)
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Hyperthyroidism
Causes
Graves disease
Most common, Ab's bind to TSH receptor and mimic it producing t3 and t4
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Clinical features
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Oligomenorrhoea, infertility
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Eyelid retraction, lid lag
Hypothyroidism
Causes
Post surgery, radioactive iodine, or anti-thyroid drugs
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