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discuss thyroid
microwave ablation

Thyroid MWA is a minimally invasive treatment for selected benign thyroid nodules. Using ultrasound guidance, a physician places a thin needle into the nodule and delivers microwave energy to heat the targeted tissue. The treated nodule gradually shrinks over time.¹

MWA may be considered when a thyroid nodule has been confirmed benign and causes pressure symptoms, visible neck changes, or cosmetic concern. Suitability also depends on the nodule’s size and location, imaging and biopsy results, symptoms, medical history, and treatment preferences.^1,2

MWA treats the nodule through a thin, image-guided needle and is intended to preserve the surrounding thyroid tissue. Surgery removes part or all of the thyroid through an incision. Surgery may still be the better choice when cancer is suspected or a nodule is not suitable for ablation. Your physician should compare the benefits, risks, and follow-up needs of each option.^2,3

Both microwave ablation (MWA) and radiofrequency ablation (RFA) use heat to shrink thyroid nodules. MWA uses microwave energy, while RFA uses electrical current to generate heat. Unlike some forms of RFA, MWA does not require a grounding pad. Clinical studies show that both can effectively reduce nodule size and improve symptoms. Your doctor can help determine which approach may be appropriate for you.^2,3,4

Yes. Thyroid MWA is commonly performed in an outpatient setting using local anesthesia. Most patients do not need general anesthesia, and many may return home the same day after a period of monitoring. The exact treatment location and discharge plan depend on the patient, physician, and facility.^1,3

Before treatment, your care team reviews your ultrasound, biopsy or FNA results, thyroid tests, medications, and health history. During the procedure, you lie on your back while the physician uses ultrasound to guide the needle and monitor the treatment. Afterward, you are observed, given discharge instructions, and scheduled for follow-up imaging to track nodule shrinkage.^1,3

Thyroid MWA is commonly performed with local anesthesia, so many patients remain awake. Sedation may also be offered. Local anesthesia provides adequate pain control for most patients, but some pressure or temporary discomfort may still occur. Tell the care team immediately about pain, voice changes, breathing difficulty, or any other new symptoms during treatment.^1,3

Ask about pain, bleeding or bruising, swelling, voice or throat changes that can sometimes persist, skin injury, thyroid-function changes, and injury to nearby neck structures. Less common risks include infection or nodule rupture. Also ask which symptoms require an urgent call or emergency care, including breathing difficulty or rapidly increasing neck swelling. Ask about follow-up, possible nodule regrowth, and whether further treatment may be needed. The specific risks depend on the nodule, treatment approach, and individual patient.^1,3

Bring your ultrasound reports or images, biopsy or FNA results, thyroid lab results, medication list—including any blood thinners—and notes about symptoms or visible neck changes. Ask whether the nodule has been confirmed benign, why MWA may or may not be appropriate, what alternatives are available, who will perform the procedure, what follow-up is required, and what your insurance may cover.