QuestionSBA
QuestionChoice
This is defined as a suppressed TSH with normal fT4 and fT3 in a patient with no symptoms. As the fT3 and fT4 levels in this case are high, this is not the correct answer.
10024223
d
Subclinical hyperthyroidism
QuestionChoice
This is not correct as the fT4 levels are also raised. In T3 toxicosis, only fT3 levels are raised. This is usually seen in multinodular goitres.
10024222
c
T3 toxicosis
QuestionChoice
Hypothyroidism, i.e. low thyroid hormone levels, increases thyroid-releasing hormone secretion from the hypothalamus and thyroid-stimulating hormone (TSH) secretion from the anterior pituitary via the hypothalamic-pituitary-thyroid axis. This results in a high TSH level with suppressed fT3 and fT4.
10024221
b
Hypothyroidism
QuestionChoice
This is defined as a high TSH with normal fT4 and fT3 in a patient with no symptoms. As the TSH is suppressed and fT3 and fT4 levels are high, this is not the correct answer.
10024224
e
Subclinical hypothyroidism
QuestionChoice
Hyperthyroidism is the presence of excess thyroid hormones (fT3 and fT4). These increased hormones act on the hypothalamic-pituitary-thyroid axis and activate a negative feedback loop. This decreases thyroid-releasing hormone (TRH) production from the hypothalamus as well as thyroid-stimulating hormone (TSH) from the anterior pituitary.
10024220
a
Hyperthyroidism
Concept
Chapter
2693
3959
Hyperthyroidism
Topic
133
Endocrinology
17242
A 37-year-old female presents to her general practitioner with irregular periods and weight loss. A series of blood tests are performed which show a suppressed TSH and high fT3 and fT4.

What is the likely diagnosis?
a