Thyroid surgery (thyroidectomy) in dogs is most commonly performed to remove thyroid tumors (thyroid carcinomas) or, less frequently, to treat hyperthyroidism. The thyroid gland sits in the neck on either side of the trachea, making surgery delicate due to the proximity to major blood vessels and nerves.
The average cost of dog thyroid surgery is $3,000, with most owners paying between $1,500 and $5,000 depending on whether one or both glands are affected.
How Much Does Dog Thyroid Surgery Cost?
| Procedure | Cost Range | Notes |
|---|---|---|
| Unilateral thyroidectomy (one gland) | $1,500–$4,000 | Most common — only one thyroid gland has a tumor |
| Bilateral thyroidectomy (both glands) | $3,000–$5,000 | Both glands affected — requires lifelong thyroid medication |
| Thyroidectomy + radioiodine therapy | $4,000–$8,000+ | If tumor has spread or can't be fully removed surgically |
| Medical management (no surgery) | $30–$100/month | Methimazole for hyperthyroidism — not effective for tumors |
Cost Breakdown
| Component | Cost |
|---|---|
| Exam + thyroid panel blood work | $150–$350 |
| Neck ultrasound (assess tumor size/position) | $200–$500 |
| Chest X-rays (check for metastasis) | $150–$350 |
| Pre-surgical blood work | $80–$200 |
| Anesthesia + monitoring | $200–$500 |
| Thyroidectomy surgery | $1,000–$3,500 |
| Histopathology (confirm tumor type) | $120–$350 |
| Overnight hospitalization (1–2 nights) | $200–$500/night |
| Take-home pain medication + antibiotics | $40–$100 |
| Follow-up visit + thyroid panel | $100–$250 |
| Lifelong thyroid supplement (if both glands removed) | $20–$40/month |
| Total (one gland) | $2,140–$6,600 |
Why Do Dogs Need Thyroid Surgery?
- •Thyroid tumors (carcinoma): The most common reason. Thyroid tumors in dogs are malignant 80–90% of the time. They can grow large and press on the trachea, causing breathing difficulty.
- •Hyperthyroidism: Rare in dogs (more common in cats), but can occur. Usually managed with medication (methimazole) rather than surgery.
- •Thyroid adenoma (benign): Less common — usually doesn't require surgery unless it grows large enough to cause problems.
Signs of Thyroid Disease in Dogs
Thyroid tumor (neck mass):
- •Visible or palpable lump in the neck
- •Difficulty swallowing
- •Changes in voice or bark
- •Coughing
- •Rapid breathing
Hyperthyroidism (overactive thyroid):
- •Weight loss despite increased appetite
- •Hyperactivity, restlessness
- •Increased thirst and urination
- •Rapid heart rate
- •Vomiting