Clinical Research Directory

Inclusion Criteria: * Age over 18 years * Written and verbal informed consent to participate in the study * Patients with hypo-, iso-, or hyperfunctioning thyroid nodules * Patients referred for thyroid surgery due to suspected malignant nodule (including Bethesda classification groups III, IV, V, and VI) * Healthy volunteers - generally good health with no chronic illnesses Exclusion Criteria: * Pregnancy * Inability to undergo the examination due to physical or mental limitations * Desire to opt out of receiving information about new, significant health findings revealed during the study * Healthy Participants: * Thyroid disease, including nodules, as well as current or past conditions affecting the thyroid * Medication that affects thyroid function