Follicular Adenoma is a benign tumor of the thyroid gland, characterized by the growth of follicular cells. These cells are responsible for producing thyroid hormones. Follicular adenomas are usually discovered incidentally during imaging studies or physical examinations and may not cause any symptoms. Although they are non-cancerous, some follicular adenomas can produce excess thyroid hormones, leading to conditions like hyperthyroidism. Diagnosis typically involves a combination of ultrasound, fine-needle aspiration biopsy, and blood tests to assess hormone levels. Treatment may include monitoring or surgical removal if there are concerns about malignancy.