Lymph node metastasis is least commonly seen with -
Follicular Ca metastasizes primarily through the blood and Lymph node metastasis is quite rare.
Lymph nodes are frequently involved in patients with


Papillary
Medullary
Hurthle cell carcinomas and
Anaplastic
Papillary Ca Thyroid
Medullary Ca Thyroid
Follicular Ca Thyroid
All of the above