Thyroid

Question 1

High fT4
Low TSH

Answer 1

Primary thyrotoxicosis

Also: destructive thyroiditis, excess iodine intake, excess thyroid hormone

Question 2

High FT4
Normal to High TSH

Answer 2

2ndary thyrotoxicosis

Question 3

Normal FT4
Normal FT3
Low TSH

Answer 3

Subclinical hyperthyroidism

Question 4

Normal FT4
High FT3
Low TSH

Answer 4

T3 toxicosis

Question 5

High TSH
Normal ft4

Answer 5

Mild/subclinical hypothyroidism

Question 6

High TSH
Low fT4

Answer 6

Primary/overt hypothy
Autoimmune hypothyroidism

Question 7

Normal TSH, T4
Low fT3 and Total

Answer 7

Central hypothyroidism
Drugs/sick euthyroid syndrome

Question 8

average daily replacement dose of levothyroxine is

Answer 8

1.6 µg/kg per day

Question 9

Methimazole dose

Question 10

PTU dose

Answer 10

propylthiouracil (PTU) (100–200 mg every 8 h initially, titrated to 50 mg once or twice a day

Question 11

Thyroid storm Treatment

Answer 11

large doses of PTU (600-mg loading dose) should be admin-
istered orally, per nasogastric tube, or per rectum, followed 1 h later by five drops of saturated solution of KI (SSKI) q6h.

Question 13

TSH level is low. T4 may be normal or minimally increased; T3 is often elevated to a greater degree than T4.

Answer 13

TOXIC MULTINODULAR GOITER
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Question 14

A thyroid scan provides a definitive diagnostic test, demonstrating focal uptake in the hyperfunctioning nodule and diminished uptake in the remainder of the gland,

Answer 14

TOXIC ADENOMA