1) Well differentiated malignant neoplasm (85% of all ca)
a) Papillary thyroid ca
- Occult
- Intrathyroidal
- Extrathyroidal
b) Follicular thyroid ca
c) Hurthle ca thyroid ca
2) Aggressive variant
a) Medullary (parafollicular c-cell)
- Sporadic
- Family trait
i) Sipple syndrome
ii) Wermer syndrome
- Anaplastic
3) Other tumor
a) Lymphoma (pre exist hashimoto thyroiditis, Graves disease)
b) Metastatic (melanoma, lung, kidney, breast, colon)
