According to the Mayo Clinic, sometimes you may develop one or more solid or fluid-filled lumps called nodules in your thyroid. Most of these are noncancerous (benign) and cause no symptoms. But a small percentage are cancerous (malignant), and serious complications are possible.
The prognosis is often excellent for a cancerous thyroid nodule. The most common types of thyroid cancer can often be completely removed with surgery.
The link below discusses the following kinds of tests:
- Blood tests
- Thyroid scans
- Fine-needle aspiration (FNA) biopsy
- Surgical biopsy
- Staging tests
- Screening tests

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