thyroid function tests

Question 1

what is the first test you do for thyroid disease

Answer 1

TSH

Question 2

what do you then test when TSH is abnormal

Answer 2

T3 and T4

Question 3

what is TSH level in hyperthyroidism

Answer 3

low

Question 4

which is the exception for low TSH in hyperthyroidism

Answer 4

pituitary adenoma as it secretes TSH so its then high

Question 5

what is the TSH level in hypothyroidism

Answer 5

high

Question 6

what are the exceptions for a high TSH in hypothyroidism

Answer 6

pituitary or hypothalamic causes (secondary hypothyroidism) which causes low TSH levels

Question 7

what are T3 and T4 levels in

hyperthyroidism

Answer 7

raised

Question 8

what are T3 and T4 levels in hypothyroidism

Answer 8

low

Question 9

T3 and T4 levels in primary hypothyroidism

Answer 9

low

Question 10

T3 and T4 levels in secondary hypothyroidism

Answer 10

low

Question 11

what are anti-TPO antibodies

Answer 11

antibodies against the thyroid gland itself

Question 12

what diseases is anti-TPO present in

Answer 12

grave’s disease and hashimoto’s thyroiditis

Question 13

when is antithyroglobulin antibodies present

Answer 13

in grave’s disease, hashimotos and thyroid cancer

Question 14

in which disease is TSH receptor antibodies present

Answer 14

Grave’s disease

Question 15

what are the results of a radioactive iodine scan for Grave’s disease

Answer 15

diffuse high uptake

Question 16

results of radioactive iodine scan in thyroid cancer

Answer 16

cold areas (abnormally low uptake)

Question 17

what causes focal high uptake of iodine in a radioactive iodine scan

Answer 17

toxic multinodular goitre and adenomas