A 37-year-old male patient with bradycardia, decreased pulse pressure, cool and/or dry skin, puffy eyes, and loss of the outer lateral eyebrows visited a laboratory for thyroid function tests. Then, the laboratory technologist collected and processed the sample according to the established SOPs. The sample was analyzed using chemiluminescence principle and the following laboratory results were reported; high TSH, low free T4, and low T3. What disease condition most likely caused the above alterations? a. Tertiary hypothyroidism b. Primary hypothyroidism c. Central hypothyroidism d. Secondary hypothyroidism
