Thyroid Malignancy

Pappilary : Most common, slowest growing, distant metastases rare, thyroglobulin tumour marker

Follicular : 2nd common, more aggressive than papillary, both local and distant metastasis

Anaplastic : Most aggresive, painful rapidly expansion, worst prognosis

Medullary : Associated with MEN 2, Calcitonin tumour marker, early total thyroidectomy curative.

Lymphoma : as generalized lymphoma or thyroid only.