Histologically, it shows papillae around a fibrovascular stalk and usually contains elements of follicular differentiation. It is slow growing and may be asymptomatic for many years. It is often multifocal. Local spread to regional nodes in the neck and mediastinum is common and 50% of patients show nodal metastases at the time of death.
It is not uncommon for a local lymph node metastasis to be detected before the primary tumour. Early metastases of this type have been termed "lateral aberrant thyroid".
Distant metastasis to the lungs or bone is rare.
Usually treated with surgery, which can be supplemented with radioiodine ablation. Survival rates are excellent
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