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Causes and Types of Hypothyroidism Quiz

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Questions and Answers

What is the primary cause of cretinism?

Excessive iodine consumption

Autoimmune thyroiditis

Congenital insufficiency of thyroid function (correct)

High TSH levels with normal T4

Which type of hypothyroidism is characterized by hypersecretion of TSH and a decrease in T4 levels?

Manifest primary hypothyroidism (correct)

Secondary hypothyroidism

Autoimmune hypothyroidism

Latent primary hypothyroidism

What is the main drug used in the treatment of hypothyroidism?

Levothyroxine sodium (correct)

Antibiotics

Iodine supplements

Thyroid hormone blockers

What levels would be observed in a patient with secondary hypothyroidism?

Low TSH and low T4 Signup and view all the answers

How is the starting daily dose of levothyroxine sodium determined for the elderly?

12.5 mcg per day Signup and view all the answers

What confirms autoimmune thyroiditis as the root cause of hypothyroidism?

Presence of thyroid antibodies Signup and view all the answers

What is the primary laboratory finding that confirms the diagnosis of autoimmune thyroiditis as the cause of hypothyroidism?

Antibodies to thyroglobulin and thyroid peroxidase Signup and view all the answers

What is the recommended daily intake of thyroxine during pregnancy?

1.9 mcg/kg per day Signup and view all the answers

What is the recommended plasma TSH concentration threshold for initiating replacement therapy in subclinical hypothyroidism?

>10 mU/l Signup and view all the answers

How is replacement therapy for primary hypothyroidism monitored?

Monitoring TSH levels Signup and view all the answers

Which of the following is NOT a risk factor for developing hypothyroid coma?

Warm climate Signup and view all the answers

How is replacement therapy for central hypothyroidism monitored?

Monitoring T4 levels Signup and view all the answers