Thyroid cancer: Diagnosis and treatment options
Thyroid cancer occurs in the thyroid gland, a small butterfly-shaped organ at the base of the neck that regulates metabolism, heart rate, and body temperature. Although it is less common than many other cancers, thyroid cancer is often highly treatable, especially when detected early. Understanding how it is diagnosed and the range of available treatment options can help patients make informed decisions about their care.
Diagnosis typically begins with a physical examination after a patient or clinician notices a lump or swelling in the neck. Ultrasound imaging is usually the first test performed, as it can identify suspicious nodules and guide further evaluation. If a nodule appears abnormal, a fine-needle aspiration (FNA) biopsy may be recommended. During this minimally invasive procedure, a thin needle is used to remove cells from the thyroid for laboratory analysis. Blood tests, including thyroid-stimulating hormone (TSH) levels, may also help evaluate thyroid function, though they cannot confirm cancer on their own.
In some cases, additional imaging such as CT scans, MRI, or radioactive iodine scans is used to determine whether the cancer has spread beyond the thyroid. Genetic testing of biopsy samples may also be performed to classify certain tumour types more accurately.
Treatment depends on the type and stage of the cancer, as well as the patient’s overall health. The most common approach is surgery, usually a thyroidectomy, in which part or all of the thyroid gland is removed. After surgery, radioactive iodine therapy may be used to destroy any remaining thyroid tissue or microscopic cancer cells. Many patients require lifelong thyroid hormone replacement medication to maintain normal metabolic function.
For more aggressive or advanced thyroid cancers, additional treatments may include external beam radiation therapy, chemotherapy, or targeted drug therapies designed to block specific cancer-growth pathways. In recent years, immunotherapy has emerged as a potential option for select cases. Regular follow-up care, including blood tests and imaging, is essential to monitor for recurrence and support long-term health.
