All the following statements about Thyroid carcinoma are true, except:
Major spread of follicular carcinoma is through blood, papillary carcinoma through lymphatics. Ref: Harrison's, 18th Edition, Page 2436
Thyroid lymphoma is often associated with hashimoto's thyroiditis
Papillary ca is multifocal
Medullary ca is associated with MEN2a
Follicular carcinoma spreads mainly by lymphatic