Study note
SurgeryThe thyroid gland

Thyroid neoplasms: benign tumour and relative incidence of malignancies

THE CONTEXT
Thyroid neoplasms include benign follicular adenoma and several malignant tumour types with different relative frequencies.

Benign neoplasm

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Follicular adenoma is classified as a benign thyroid neoplasm.

Relative incidence of primary thyroid malignancies

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Papillary carcinoma accounts for 80% and follicular carcinoma for 10% of primary malignant thyroid tumours.
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Poorly differentiated/anaplastic carcinoma accounts for 5%.
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Medullary carcinoma and lymphoma each account for 2.5%.
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