A patient appears in a clinic complaining of irritability and chronic sweatiness. He also has a lump in his neck near his larynx. Blood tests show he has low levels of thyroid-stimulating hormone (TSH) in his plasma. Which of the following is the most likely diagnosis?
A) primary hypothyroidism
B) an iodine-insufficient diet
C) secondary hypothyroidism
D) hyposecretion of TRH
E) Graves' disease

Question

Quizplus · Accepted Answer

The symptoms and low TSH levels suggest hyperthyroidism, and the presence of a neck lump (likely a goiter) and irritability are consistent with Graves' disease, an autoimmune disorder causing overproduction of thyroid hormones.

A Patient Appears in a Clinic Complaining of Irritability and Chronic